Compilare: user.cpp: In function ‘int main()’: user.cpp:52:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[srt[i]].size(); j++) ^ user.cpp:71:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < t[srt[i]].size(); j++) ^ user.cpp:89:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[srt[i]].size(); j++) ^ user.cpp:28:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm2.in", "r", stdin); ^ user.cpp:29:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm2.out", "w", stdout); ^ user.cpp:30:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:31:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i = 0; i < n; i++) { scanf("%d", &costuri[i]); } ^ user.cpp:34:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &ax); ^ user.cpp:37:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a); a--; ^