Compilare: main.cpp: In function 'int main()': main.cpp:101:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pensula.in", "r", stdin); ^ main.cpp:102:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pensula.out", "w", stdout); ^ main.cpp:104:54: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n, m, q, c; scanf("%d %d %d %d", &n, &m, &q, &c); ^ main.cpp:119:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x; scanf("%d", &x); ^