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-rwxr-xr-xday01/day01bin0 -> 79296 bytes
-rw-r--r--day01/day01.cpp52
-rw-r--r--day01/day01_input.txt2000
-rw-r--r--day01/day01_input_ez.txt10
-rw-r--r--day01/makefile2
-rwxr-xr-xday02/day02bin0 -> 47672 bytes
-rw-r--r--day02/day02.cpp50
-rw-r--r--day02/day02_input.txt1000
-rw-r--r--day02/makefile2
-rwxr-xr-xday03/day03bin0 -> 83112 bytes
-rw-r--r--day03/day03.cpp96
-rw-r--r--day03/day03_input.txt1000
-rw-r--r--day03/day03_input_ez.txt12
-rw-r--r--day03/makefile2
-rwxr-xr-xday04/day04bin0 -> 116280 bytes
-rw-r--r--day04/day04.cpp134
-rw-r--r--day04/day04_input.txt601
-rw-r--r--day04/day04_input_ez.txt19
-rw-r--r--day04/makefile2
19 files changed, 4982 insertions, 0 deletions
diff --git a/day01/day01 b/day01/day01
new file mode 100755
index 0000000..8fb500a
--- /dev/null
+++ b/day01/day01
Binary files differ
diff --git a/day01/day01.cpp b/day01/day01.cpp
new file mode 100644
index 0000000..113f86d
--- /dev/null
+++ b/day01/day01.cpp
@@ -0,0 +1,52 @@
+#include <iostream>
+#include <string>
+#include <vector>
+#include <algorithm>
+
+std::string read (char* name) {
+ FILE *f = fopen(name, "r");
+ char c = fgetc(f); std::string txt;
+ while (c != EOF) { txt += c; c = fgetc(f); }
+ fclose(f);
+ return txt;
+}
+
+std::vector<std::string> split (std::vector<std::string> vec, std::string name) {
+ auto token = name.find("\n");
+ if (token != std::string::npos) {
+ vec.push_back(name.substr(0, token));
+ return split(vec, name.substr(token+1));
+ } else if (name.size() > 1) {
+ vec.push_back(name);
+ }
+ return vec;
+}
+
+int main (int argc, char* argv[]) {
+ if (argc < 2 && argc > 3) return 1;
+ std::string txt = read(argv[1]);
+
+ std::vector<std::string> vec;
+ vec = split(vec, txt);
+ std::vector<int> depths;
+ for (auto v : vec) {
+ depths.push_back(std::stoi(v));
+ }
+
+ int window = 1;
+ if (argc == 3) { window = atoi(argv[2]); }
+
+ int inc = 0;
+ for (std::size_t i=0; i<depths.size(); i++) {
+ if (i >= window) {
+ int sum0 = 0, sum1 = 0;
+ for (int j=0; j<window; j++) sum0 += depths[i-j-1];
+ for (int j=0; j<window; j++) sum1 += depths[i-j];
+ if (sum1 > sum0) inc ++;
+ }
+ }
+
+ std::cout << "The number of depth increases is " << inc << std::endl;
+
+ return 0;
+}
diff --git a/day01/day01_input.txt b/day01/day01_input.txt
new file mode 100644
index 0000000..b3ee114
--- /dev/null
+++ b/day01/day01_input.txt
@@ -0,0 +1,2000 @@
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diff --git a/day01/day01_input_ez.txt b/day01/day01_input_ez.txt
new file mode 100644
index 0000000..167e291
--- /dev/null
+++ b/day01/day01_input_ez.txt
@@ -0,0 +1,10 @@
+199
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+269
+260
+263
diff --git a/day01/makefile b/day01/makefile
new file mode 100644
index 0000000..92fb064
--- /dev/null
+++ b/day01/makefile
@@ -0,0 +1,2 @@
+all day01.cpp:
+ g++ -std=c++20 -o day01 day01.cpp
diff --git a/day02/day02 b/day02/day02
new file mode 100755
index 0000000..8755c57
--- /dev/null
+++ b/day02/day02
Binary files differ
diff --git a/day02/day02.cpp b/day02/day02.cpp
new file mode 100644
index 0000000..dccb44a
--- /dev/null
+++ b/day02/day02.cpp
@@ -0,0 +1,50 @@
+#include <iostream>
+
+int main (int argc, char *argv[]) {
+ if (argc != 2) return 1;
+
+ int depth = 0;
+ int forward = 0;
+
+ int aim = 0;
+ int aim_depth = 0;
+
+ FILE *f = fopen(argv[1], "r");
+ char c = fgetc(f);
+ std::string command;
+ while (c != EOF) {
+ if (c == '\n') {
+ auto token_space = command.find(" ");
+ if (token_space != std::string::npos) {
+ std::string op = command.substr(0, token_space);
+ int amt = std::stoi(command.substr(token_space+1));
+ if (op == "forward") {
+ forward += amt;
+ aim_depth += aim * amt;
+ }
+ if (op == "down") {
+ depth += amt;
+ aim += amt;
+ }
+ if (op == "up") {
+ depth -= amt;
+ aim -= amt;
+ }
+ }
+ command = "";
+ }
+ else command += c;
+ c = fgetc(f);
+ }
+
+ std::cout << "depth " << depth << ", "
+ << "forward " << forward << ", "
+ << "product " << depth * forward << std::endl;
+
+ std::cout << "using aim: depth " << aim_depth << ", "
+ << "forward " << forward << ", "
+ << "aim " << aim << ", "
+ << "product " << aim_depth * forward << std::endl;
+
+ return 0;
+}
diff --git a/day02/day02_input.txt b/day02/day02_input.txt
new file mode 100644
index 0000000..7834464
--- /dev/null
+++ b/day02/day02_input.txt
@@ -0,0 +1,1000 @@
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diff --git a/day02/makefile b/day02/makefile
new file mode 100644
index 0000000..61ca2f4
--- /dev/null
+++ b/day02/makefile
@@ -0,0 +1,2 @@
+all day02.cpp:
+ g++ -std=c++20 -o day02 day02.cpp
diff --git a/day03/day03 b/day03/day03
new file mode 100755
index 0000000..ccb1732
--- /dev/null
+++ b/day03/day03
Binary files differ
diff --git a/day03/day03.cpp b/day03/day03.cpp
new file mode 100644
index 0000000..036cd07
--- /dev/null
+++ b/day03/day03.cpp
@@ -0,0 +1,96 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+
+int bin_to_dec (std::string bin) {
+ int dec = 0, pow = 1;
+ for (std::size_t i=bin.size(); i > 0; i--) {
+ dec += pow * (bin[i-1] == '0' ? 0 : 1);
+ pow *= 2;
+ }
+ return dec;
+}
+
+std::vector<int> get_freq (std::vector<std::string> bits) {
+ std::vector<int> freq;
+ for (std::size_t i=0; i<bits[0].size(); i++) {
+ freq.push_back(0);
+ }
+
+ for (auto b : bits) {
+ for (std::size_t i=0; i< b.size(); i++) {
+ freq[i] += (b[i] == '0' ? 0 : 1)*2-1;
+ }
+ }
+ return freq;
+}
+
+std::vector<std::string> filter (std::vector<std::string> bits, int inv, int sel) {
+ std::vector<std::string> res;
+ auto freq = get_freq(bits);
+
+ for (auto b : bits) {
+ int f = freq[sel] * inv;
+ if (f == 0) f += inv;
+ if ((f > 0 ? '0' : '1') == b[sel]) {
+ res.push_back(b);
+ }
+ }
+
+ return res;
+}
+
+int main (int argc, char *argv[]) {
+ if (argc != 2) return 1;
+
+ std::string raw;
+ std::getline(std::ifstream(argv[1]), raw, '\0');
+
+ std::vector<std::string> bits;
+
+ while (1) {
+ auto token = raw.find("\n");
+ if (token != std::string::npos) {
+ bits.push_back(raw.substr(0, token));
+ raw = raw.substr(token+1);
+ } else {
+ if (raw.size() > 0) bits.push_back(raw);
+ break;
+ }
+ }
+
+ auto freq = get_freq(bits);
+
+ std::string gamma = "", epsilon = "";
+ for (std::size_t i=0; i<freq.size(); i++) {
+ gamma += freq[i] > 0 ? "1" : "0";
+ epsilon += freq[i] > 0 ? "0" : "1";
+ }
+
+ int g = bin_to_dec(gamma);
+ int e = bin_to_dec(epsilon);
+ std::cout << "power level " << e*g << ", "
+ << "epsilon " << e << " (" << epsilon << "), "
+ << "gamma " << g << " (" << gamma << ")" << std::endl;
+
+ std::vector<std::string> o2 = bits;
+ for (std::size_t i=0; i<freq.size(); i++) {
+ o2 = filter(o2, 1, i);
+ if (o2.size() == 1) break;
+ }
+
+ std::vector<std::string> co2 = bits;
+ for (std::size_t i=0; i<freq.size(); i++) {
+ co2 = filter(co2, -1, i);
+ if (co2.size() == 1) break;
+ }
+
+ int generator = bin_to_dec(o2[0]);
+ int scrubber = bin_to_dec(co2[0]);
+ std::cout << "oxigen generator rating " << scrubber*generator << ", "
+ << "epsilon " << generator << " (" << o2[0] << "), "
+ << "gamma " << scrubber << " (" << co2[0] << ")" << std::endl;
+
+ return 0;
+}
diff --git a/day03/day03_input.txt b/day03/day03_input.txt
new file mode 100644
index 0000000..ac22a69
--- /dev/null
+++ b/day03/day03_input.txt
@@ -0,0 +1,1000 @@
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diff --git a/day03/day03_input_ez.txt b/day03/day03_input_ez.txt
new file mode 100644
index 0000000..a6366a8
--- /dev/null
+++ b/day03/day03_input_ez.txt
@@ -0,0 +1,12 @@
+00100
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diff --git a/day03/makefile b/day03/makefile
new file mode 100644
index 0000000..7c21cf0
--- /dev/null
+++ b/day03/makefile
@@ -0,0 +1,2 @@
+all day03.cpp:
+ g++ -std=c++20 -o day03 day03.cpp
diff --git a/day04/day04 b/day04/day04
new file mode 100755
index 0000000..b28d295
--- /dev/null
+++ b/day04/day04
Binary files differ
diff --git a/day04/day04.cpp b/day04/day04.cpp
new file mode 100644
index 0000000..7736eff
--- /dev/null
+++ b/day04/day04.cpp
@@ -0,0 +1,134 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+
+void split (std::vector<std::string> &vec, std::string str, std::string del) {
+ auto token = str.find(del);
+ if (token != std::string::npos) {
+ vec.push_back(str.substr(0, token));
+ split(vec, str.substr(token+del.size()), del);
+ } else { vec.push_back(str); }
+}
+
+class Board {
+ public:
+ Board(std::string repr) {
+ std::vector<std::string> lines;
+ split(lines, repr, "\n");
+ for (auto line : lines) {
+ std::vector<std::string> strcells;
+ split(strcells, line, " ");
+ size = 0;
+ for (auto strcell : strcells) {
+ if (strcell.size() == 0) continue;
+ cells.push_back(std::stoi(strcell));
+ state.push_back(0);
+ size++;
+ }
+ }
+
+ }
+
+ int size;
+ std::vector<int> cells;
+ std::vector<int> state;
+
+ void mark (int ex) {
+ for (int y=0; y<size; y++) {
+ for (int x=0; x<size; x++) {
+ int i = x + y*size;
+ if (cells[i] == ex) {
+ state[i] = 1;
+ }
+ }
+ }
+ }
+
+ bool win () {
+ for (int y=0; y<size; y++) {
+ int sum_row = 0;
+ for (int x=0; x<size; x++) {
+ int i = x + y*size;
+ sum_row += state[i];
+ }
+ if (sum_row == size) return true;
+ }
+ for (int x=0; x<size; x++) {
+ int sum_col = 0;
+ for (int y=0; y<size; y++) {
+ int i = x + y*size;
+ sum_col += state[i];
+ }
+ if (sum_col == size) return true;
+ }
+ return false;
+ }
+
+ int score () {
+ int sum = 0;
+ for (int y=0; y<size; y++) {
+ for (int x=0; x<size; x++) {
+ int i = x + y*size;
+ if (state[i] == 0) {
+ sum += cells[i];
+ }
+ }
+ }
+ return sum;
+ }
+};
+
+int main (int argc, char *argv[]) {
+ if (argc != 2) return 1;
+ std::string raw;
+ std::getline(std::ifstream(argv[1]), raw, '\0');
+
+ std::vector<int> extract;
+ auto token = raw.find("\n");
+ if (token != std::string::npos) {
+ std::string ex = raw.substr(0, token);
+ std::vector<std::string> vec;
+ split(vec, ex, ",");
+ for (auto v : vec) { extract.push_back(std::stoi(v)); }
+
+ raw = raw.substr(token+2);
+ if (raw[raw.size()-1] == '\n') raw = raw.substr(0, raw.size()-1);
+ } else return 1;
+
+ std::vector<Board> boards;
+
+ std::vector<std::string> str_boards;
+ split(str_boards, raw, "\n\n");
+ for (auto s : str_boards) {
+ boards.emplace_back(s);
+ }
+
+ bool flag = false;
+ std::vector<Board> filtered = boards;
+ for (int ex : extract) {
+ std::cout << ex << " " << filtered.size() << std::endl;
+ std::vector<Board> next;
+ int size = filtered.size(), seen = 0;;
+ for (auto& board : filtered) {
+ board.mark(ex);
+ if (board.win() && filtered.size() != 1) {
+ if (!flag) {
+ std::cout << "first winner product: " << ex * board.score() << ", "
+ << "ex: " << ex << ", score: " << board.score() << std::endl;
+ flag = true;
+ }
+ } else {
+ next.push_back(board);
+ }
+ }
+ if (next.size() == 1 && next[0].win()) {
+ int score = next[0].score();
+ std::cout << "last winner product: " << ex * score << ", "
+ << "ex: " << ex << ", score: " << score << std::endl;
+ break;
+ }
+ filtered = next;
+ }
+
+ return 0;
+}
diff --git a/day04/day04_input.txt b/day04/day04_input.txt
new file mode 100644
index 0000000..033baa2
--- /dev/null
+++ b/day04/day04_input.txt
@@ -0,0 +1,601 @@
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diff --git a/day04/day04_input_ez.txt b/day04/day04_input_ez.txt
new file mode 100644
index 0000000..669a51d
--- /dev/null
+++ b/day04/day04_input_ez.txt
@@ -0,0 +1,19 @@
+7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
+
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diff --git a/day04/makefile b/day04/makefile
new file mode 100644
index 0000000..ef809af
--- /dev/null
+++ b/day04/makefile
@@ -0,0 +1,2 @@
+all day04.cpp:
+ g++ -std=c++20 -o day04 day04.cpp
generated by cgit v1.2.3-54-g00ecf (git 2.45.1) at 2024-11-22 06:48:32 +0000