Compilare: main.cpp: In function 'int main()': main.cpp:77:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i1 = 0 ; i1 < G[j].size() ; i1 ++) ~~~^~~~~~~~~~~~~ main.cpp:45:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("munte2.in" , "r" , stdin); ^ main.cpp:46:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("munte2.out" , "w" , stdout); ^ main.cpp:49:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf" , &n , &k , &l); ^ main.cpp:52:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf" , &x , &y); ^