Compilare: main.cpp: In function 'int main()': main.cpp:61:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | while (ii < v[x].size() && jj < v[y].size()) | ~~~^~~~~~~~~~~~~ main.cpp:61:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | while (ii < v[x].size() && jj < v[y].size()) | ~~~^~~~~~~~~~~~~ main.cpp:72:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | while (ii < v[x].size()) | ~~~^~~~~~~~~~~~~ main.cpp:76:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | while (jj < v[y].size()) | ~~~^~~~~~~~~~~~~