Compilare: user.cpp: In function ‘int main()’: user.cpp:17:97: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puncte.in","r",stdin),freopen("puncte.out","w",stdout),scanf("%d%d",&n,&m),z[1]=INF; ^ user.cpp:17:97: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:17:97: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:19:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p[i].x,&p[i].y); ^ user.cpp:25:99: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x),i=upper_bound(z,z+l,x)-z-1,printf("%lld\n",sqr(x-p[s[i]].x)+sqr(p[s[i]].y)); ^