Compilare: main.cpp: In function 'int main()': main.cpp:70:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for ( j = 0; j < pex[x].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:72:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for ( j = 0; j < pey[y].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:74:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for ( j = 0; j < pex[x].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:77:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for ( j = 0; j < pey[y].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:79:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for ( j = 0; j < pex[x].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:81:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for ( j = 0; j < pey[y].size(); j++ ) | ~~^~~~~~~~~~~~~~~