Compilare: user.cpp: In function ‘void CreateComponent(int, int)’: user.cpp:18:9: warning: unused variable ‘x’ [-Wunused-variable] int x=Stack.top().first,y=Stack.top().second; ^ user.cpp:18:29: warning: unused variable ‘y’ [-Wunused-variable] int x=Stack.top().first,y=Stack.top().second; ^ user.cpp: In function ‘void DFS(int, int)’: user.cpp:31:28: 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:55:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<component[i].size();j++) ^ user.cpp:43:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.in","r",stdin); ^ user.cpp:44:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.out","w",stdout); ^ user.cpp:46:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:48:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^