Compilare: main.cpp: In function 'int main()': main.cpp:47:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for ( j = 0; j < pex[x].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:49:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for ( j = 0; j < pey[y].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:51:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for ( j = 0; j < pex[x].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:54:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for ( j = 0; j < pey[y].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:56:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for ( j = 0; j < pex[x].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:58:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for ( j = 0; j < pey[y].size(); j++ ) | ~~^~~~~~~~~~~~~~~