Compilare: user.cpp: In function ‘int main()’: user.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i].size()==ri) ^ user.cpp:55:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[*it].size()==ri) ^ user.cpp:68:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i].size()==ri-1) continue; ^ user.cpp:70:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[*it].size()==ri-1) L[i].push_back(*it); ^ user.cpp:73:9: warning: unused variable ‘cnt’ [-Wunused-variable] int cnt=n; ^ user.cpp:74:9: warning: unused variable ‘cuplaj’ [-Wunused-variable] int cuplaj=0; ^ user.cpp:35:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ar.in","r",stdin); ^ user.cpp:36:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ar.out","w",stdout); ^ user.cpp:37:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&ri); ^ user.cpp:40:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^