Compilare: main.cpp: In function 'int main()': main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ans[j] + i <= v2.size()) ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:63:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v2.size(); ++j) ~~^~~~~~~~~~~ main.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pz < qa.size() && j + 1 - i == ans[qa[pz]]) ~~~^~~~~~~~~~~