Compilare: user.cpp: In function ‘int main()’: user.cpp:111:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < poz.size(); k++) ^ user.cpp:56:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in", "r", stdin); ^ user.cpp:57:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out", "w", stdout); ^ user.cpp:59:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n" , &t, &n, &m); ^ user.cpp:62:34: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(harta[i],401,stdin); ^