Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:20:19: error: expected initializer before ‘ans’ unsigned __int64 ans = 0; ^ user.cpp:48:24: error: ‘ans’ was not declared in this scope if (bit_cnt(i) == K) ans += DP[1][i]; ^ user.cpp:50:19: error: ‘ans’ was not declared in this scope printf("%llu\n", ans); ^ user.cpp:18:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ture.out", "w", stdout); ^ user.cpp:22:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &N, &M, &K, &P); ^ user.cpp:28:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] !swap ? blocked[x][y] = 1 : blocked[y][x] = 1; ^