Compilare: user.cpp: In function ‘void prim(int)’: user.cpp:11:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[s].size(); i++) ^ user.cpp:24:47: warning: too many arguments for format [-Wformat-extra-args] printf("%d\n",x.second.second,x.second.first); ^ user.cpp:27:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[s].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:46:39: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 4 has type ‘int*’ [-Wformat=] scanf("%d%d%lld%lld",&t1,&t2,&t3,&t4); ^ user.cpp:46:39: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 5 has type ‘int*’ [-Wformat=] user.cpp:40:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lazy.in","r",stdin); ^ user.cpp:41:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lazy.out","w",stdout); ^ user.cpp:43:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:46:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lld%lld",&t1,&t2,&t3,&t4); ^