Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:86:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[t.node].size();i++) ^ user.cpp:44:34: warning: unused variable ‘dragon’ [-Wunused-variable] int p,n,m,i,j,mini=inf,x,y,c,dragon,node,dist; ^ user.cpp:44:41: warning: unused variable ‘node’ [-Wunused-variable] int p,n,m,i,j,mini=inf,x,y,c,dragon,node,dist; ^ user.cpp:44:46: warning: unused variable ‘dist’ [-Wunused-variable] int p,n,m,i,j,mini=inf,x,y,c,dragon,node,dist; ^ user.cpp:42:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.in","r",stdin); ^ user.cpp:43:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.out","w",stdout); ^ user.cpp:47:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&p,&n,&m); ^ user.cpp:49:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&drg[i]); ^ user.cpp:52:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^