dbg

@@ -1,5 +1,5 @@
 #!/bin/bash
 
 set -e
-script/build $1
+./build $1
 gdb a.out

input/2025-7.sample.txt

@@ -1,16 +0,0 @@
-.......S.......
-...............
-.......^.......
-...............
-......^.^......
-...............
-.....^.^.^.....
-...............
-....^.^...^....
-...............
-...^.^...^.^...
-...............
-..^...^.....^..
-...............
-.^.^.^.^.^...^.
-...............

run

@@ -2,5 +2,5 @@
 
 set -e
 
-script/build $1
+./build $1
 ./a.out

script/async-build

@@ -1,5 +0,0 @@
-#!/bin/bash
-
-set -e
-
-script/build $1&

src/day1.cpp

@@ -1,4 +1,3 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 1"
 #include <fstream>
 #include <iostream>
 #include <vector>

src/day2.cpp

@@ -1,4 +1,4 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 2"
+// :autocmd BufWritePost *.cpp :silent exec "!./build 2"
 #include <fstream>
 #include <iostream>
 #include <numeric>

src/day3.cpp

@@ -1,4 +1,4 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 3"
+// :autocmd BufWritePost *.cpp :silent exec "!./build 3"
 #include <fstream>
 #include <iostream>
 #include <numeric>

src/day4.cpp

@@ -1,4 +1,4 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 4"
+// :autocmd BufWritePost *.cpp :silent exec "!./build 4"
 #include <cstdint>
 #include <fstream>
 #include <iostream>

src/day5.cpp

@@ -1,4 +1,4 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 5"
+// :autocmd BufWritePost *.cpp :silent exec "!./build 5"
 #include <algorithm>
 #include <cstdint>
 #include <fstream>

src/day6.cpp

@@ -1,4 +1,4 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 6"
+// :autocmd BufWritePost *.cpp :silent exec "!./build 6"
 #include <cstdint>
 #include <fstream>
 #include <iostream>

src/day7.cpp

@@ -1,100 +0,0 @@
-// :autocmd BufWritePost *.cpp :silent exec "!script/async-build 7"
-#include <cstdint>
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <numeric>
-#include <set>
-#include <string>
-#include <vector>
-
-using Grid = std::vector<std::string>;
-using Location = std::tuple<size_t, size_t>;
-
-int64_t part_1(const Grid &grid);
-int64_t part_2(const Grid &grid);
-
-int main() {
-  Grid grid;
-  std::ifstream file{"input/2025-7.txt"};
-  std::string line;
-  while (std::getline(file, line)) {
-    grid.emplace_back(line);
-  }
-  std::cout << "Part 1: " << part_1(grid) << std::endl;
-  std::cout << "Part 2: " << part_2(grid) << std::endl;
-  return 0;
-}
-
-char at_loc(const Grid &grid, size_t row, size_t col) {
-  if (row >= 0 && row < grid.size() && col >= 0 && col < grid[row].size()) {
-    return grid[row][col];
-  } else {
-    return '.';
-  }
-}
-
-Location find_start(const Grid &grid) {
-  for (int64_t row{0}; row < grid.size(); ++row) {
-    for (int64_t col{0}; col < grid[row].length(); ++col) {
-      if (grid[row][col] == 'S') {
-        return Location{row, col};
-      }
-    }
-  }
-  throw "unreachable";
-}
-
-int64_t part_1(const Grid &grid) {
-  int64_t ans{0};
-  Location start = find_start(grid);
-  const auto [start_row, start_col]{start};
-  std::set<size_t> cols{};
-  cols.insert(start_col);
-  for (size_t row{start_row}; row < grid.size(); ++row) {
-    std::set<size_t> next_cols{};
-    for (auto col : cols) {
-      if (at_loc(grid, row, col) == '^') {
-        ans += 1;
-        next_cols.insert(col + 1);
-        next_cols.insert(col - 1);
-      } else {
-        next_cols.insert(col);
-      }
-    }
-    cols = next_cols;
-  }
-  return ans;
-}
-
-void insert_or_increment(std::map<size_t, int64_t> &cols, size_t col,
-                    int64_t value) {
-  auto iter = cols.find(col);
-  if (iter == cols.end()) {
-    cols.insert({col, value});
-  } else {
-    iter->second += value;
-  }
-}
-
-int64_t part_2(const Grid &grid) {
-  Location start = find_start(grid);
-  const auto [start_row, start_col]{start};
-  std::map<size_t, int64_t> cols;
-  cols.insert(std::make_pair(start_col, 1));
-  for (size_t row{start_row}; row < grid.size(); ++row) {
-    std::map<size_t, int64_t> next_cols;
-    for (auto [col, cnt] : cols) {
-      if (at_loc(grid, row, col) == '^') {
-        insert_or_increment(next_cols, col - 1, cnt);
-        insert_or_increment(next_cols, col + 1, cnt);
-      } else {
-        insert_or_increment(next_cols, col, cnt);
-      }
-    }
-    cols = std::move(next_cols);
-  }
-  return std::accumulate(
-      cols.begin(), cols.end(), 0ll,
-      [](int64_t acc, auto entry) { return acc + entry.second; });
-}