Compilare: user.cpp: In function ‘void Brute(long int)’: user.cpp:107:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<Blks[id].pts.size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:144:18: warning: unused variable ‘need’ [-Wunused-variable] long need = getNeed(i); ^ user.cpp:126:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distancesum.in","r",stdin); ^ user.cpp:127:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distancesum.out","w",stdout); ^ user.cpp:129:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); ^ user.cpp:133:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=0;i<n;i++) scanf("%ld %ld",&v[i].x,&v[i].y); ^ user.cpp:142:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&pp.x,&pp.y); Ans = 0; ^ user.cpp: In function ‘long int getNeed(long int)’: user.cpp:95:37: warning: ‘cmp’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=1;i<=4;i++) if(r[i] != -1 && r[i] != cmp) return 0; ^