Compilare: user.cpp: In function ‘int main()’: user.cpp:111:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < C.size(); i++) ^ user.cpp:117:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < C.size(); i++) ^ user.cpp:121:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < mut1.size(); i++) ^ user.cpp:125:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < mut2.size(); i++) ^ user.cpp:79:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cinema.in", "r", stdin); ^ user.cpp:80:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cinema.out", "w", stdout); ^ user.cpp:82:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:84:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^