Compilare: user.cpp: In function ‘int main()’: user.cpp:93:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vf.size();i++){ ^ user.cpp:95:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pWhere<ch.size() && ch[pWhere].first<=tt+eps) swapV(ch[pWhere].second),pWhere++; ^ user.cpp:66:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bombe.in","r",stdin); ^ user.cpp:67:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bombe.out","w",stdout); ^ user.cpp:69:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %lf",&n,&R); R*=2; pos.resize(n); ans = n; ^ user.cpp:70:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;i++) scanf("%lf %lf",&e[i].b,&e[i].a); ^