Compilare: user.cpp: In function ‘int main()’: user.cpp:47:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[x.node].size(); i++) ^ user.cpp:27:23: warning: unused variable ‘node’ [-Wunused-variable] int n,m,i,x1,y1,c,node,j=0; ^ user.cpp:27:28: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,x1,y1,c,node,j=0; ^ user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin); ^ user.cpp:26:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out","w",stdout); ^ user.cpp:29:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:32:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x1,&y1,&c); ^