Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<desc[x].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:68:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(l=0;l<desc[varf].size();++l) ^ user.cpp:35:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri2.in","r",stdin); ^ user.cpp:36:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri2.out","w",stdout); ^ user.cpp:38:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:41:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:37:19: warning: ‘bossdeboss’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,k,i,x,y,bossdeboss,j,l,varf,m; ^