Eroare de compilare: user.cpp: In function ‘void del(int, int)’: user.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<a[x].size(); i++) ^ user.cpp: In function ‘std::vector<int> eul(int)’: user.cpp:46:40: error: ‘count’ was not declared in this scope if (count(a[v].begin(),a[v].end(),i)!=0 && c>2) return x; ^ user.cpp:55:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<y.size(); i++) ^ user.cpp: In function ‘void write()’: user.cpp:64:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<x.size(); i++) ^ user.cpp: At global scope: user.cpp:68:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:71:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i<a.size(); i++) ^