Compilare: user.cpp: In function ‘bool inc(std::vector<int>, std::vector<int>)’: user.cpp:54:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( p < lst2.size() && x == lst2[p] ) ^ user.cpp:58:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return ( p == lst2.size() ); ^ user.cpp: In function ‘int main()’: user.cpp:82:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < edg[i].size(); j ++ ) { ^ user.cpp:83:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int k = j + 1; k < edg[i].size(); k ++ ) { ^ user.cpp:103:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int k = 0; k < lst.size(); k ++ ) { ^ user.cpp:104:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( cnt[j][lst[k]] != lst.size() - 1 ) ^ user.cpp:112:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int k = 0; k < edg[j].size(); k ++ ) { ^ user.cpp:113:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int p = k + 1; p < edg[j].size(); p ++ ) { ^