Compilare: user.cpp: In function ‘void solve()’: user.cpp:73:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vc1.size(); ++i) ^ user.cpp:62:19: warning: array subscript is above array bounds [-Warray-bounds] if(uz2[a[2][i]]) ^ user.cpp:67:16: warning: array subscript is above array bounds [-Warray-bounds] uz2[a[2][i]] = 1; ^ user.cpp:78:20: warning: array subscript is above array bounds [-Warray-bounds] elem2 = a[2][vc2[i].second]; ^ user.cpp:81:12: warning: array subscript is above array bounds [-Warray-bounds] a[2][vc2[i].first] = elem1; ^