Compilare: main.cpp: In function 'int main()': main.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int j = 0; j < p[i].size(); j++) | ~~^~~~~~~~~~~~~ main.cpp:32:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if (p[i][j].second + 1 != a[p[i][j].first].size())