Compilare: user.cpp: In function ‘int solve()’: user.cpp:25:37: warning: unused variable ‘val’ [-Wunused-variable] int nod=(*T.begin()).second,val=(*T.begin()).first; ^ user.cpp: In function ‘void read()’: user.cpp:8:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("camionas.in","r",stdin); ^ user.cpp:9:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&N,&M,&G); ^ user.cpp:12:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&g); ^