Compilare: main.cpp: In function 'void solve()': main.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<v[i].size(); ++j) ~^~~~~~~~~~~~ main.cpp:77:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[i].size(); ++j) ~^~~~~~~~~~~~ main.cpp:82:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(auto it : ans) fout << it << ' '; fout << '\n'; ^~~ main.cpp:82:43: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(auto it : ans) fout << it << ' '; fout << '\n'; ^~~~