Compilare: main.cpp: In function 'void bkt(int, int, int, int, int)': main.cpp:34:15: warning: statement has no effect [-Wunused-value] for(_j; _j<=n; ++_j){ ^ main.cpp: In function 'void read()': main.cpp:19:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.in", "r", stdin); ^ main.cpp:20:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ main.cpp: In function 'void solve()': main.cpp:24:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.out", "w", stdout); ^