Compilare: user.cpp: In function ‘int main()’: user.cpp:64:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<edges.size();j++) ^ user.cpp:67:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<temp.size();j++) ^ user.cpp:51:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,n; ^ user.cpp:49:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desen.in","r",stdin); ^ user.cpp:50:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desen.out","w",stdout); ^ user.cpp:52:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:54:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&points[i].x,&points[i].y); ^