Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ve[x].size();i++) ^ user.cpp:46:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[ve[x][i].x].size()>maxi) ^ user.cpp:58:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ve[x].size();i++) ^ user.cpp:62:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[ve[x][i].x].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:88:19: warning: unused variable ‘j’ [-Wunused-variable] int q,t,n,m,i,j,x,y,sum=0; ^ user.cpp:86:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("autobuze3.in","r",stdin); ^ user.cpp:87:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("autobuze3.out","w",stdout); ^ user.cpp:90:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:93:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:99:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&mu[i].x,&mu[i].y,&mu[i].c); ^ user.cpp: In function ‘void dfs(int)’: user.cpp:40:21: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ok=0,maxi=0,p; ^