Compilare: user.cpp: In function ‘int main()’: user.cpp:29:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < vct[k].size(); j++) ^ user.cpp:38:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < vct[k].size(); j++) ^ user.cpp:17:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ user.cpp:18:48: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^ user.cpp:19:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:22:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&tp,&x); ^