Compilare: user.cpp: In function ‘int main()’: user.cpp:27:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[i].size()<=rad) ^ user.cpp:29:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<poz[i].size();j++) ^ user.cpp:30:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j;k<poz[i].size();k++) ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bvarcolaci.in","r",stdin); ^ user.cpp:13:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bvarcolaci.out","w",stdout); ^ user.cpp:15:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:18:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^