from collections import deque def solve(): file = "input.txt" grid = [] with open(file, 'r') as f: for line in f: grid.append(list(line.strip())) rows = len(grid) cols = len(grid[0]) start = None end = None for r in range(rows): for c in range(cols): if grid[r][c] == 'S': start = (r, c) elif grid[r][c] == 'E': end = (r, c) def bfs(start, end, max_cheat=0): q = deque([(start, 0, 0)]) visited = set() while q: (r, c), steps, cheat_used = q.popleft() if (r, c) == end: return steps if ((r, c), cheat_used) in visited: continue visited.add(((r, c), cheat_used)) for dr, dc in [(0, 1), (0, -1), (1, 0), (-1, 0)]: nr, nc = r + dr, c + dc if 0 <= nr < rows and 0 <= nc < cols: if grid[nr][nc] != '#': q.append(((nr, nc), steps + 1, cheat_used)) elif cheat_used < max_cheat: q.append(((nr, nc), steps + 1, cheat_used + 1)) return float('inf') baseline = bfs(start, end) count1 = 0 count2 = 0 for sr in range(rows): for sc in range(cols): for er in range(rows): for ec in range(cols): if grid[sr][sc] != '#' and grid[er][sc] != '#': time1 = bfs(start, (sr, sc), 0) + bfs((sr, sc), (er, ec), 2) + bfs((er, ec), end, 0) saved1 = baseline - time1 if saved1 >= 100: count1 += 1 time2 = bfs(start, (sr, sc), 0) + bfs((sr, sc), (er, ec), 20) + bfs((er, ec), end, 0) saved2 = baseline - time2 if saved2 >= 100: count2 += 1 print(count1) print(count2) solve()