Compilare: main.cpp: In function 'int main()': main.cpp:33:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for(int i=0;i<a[z].size();i++) | ~^~~~~~~~~~~~ main.cpp:53:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(int i=0;i<a[z].size();i++) | ~^~~~~~~~~~~~ main.cpp:74:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for(int i=0;i<a[z].size();i++) | ~^~~~~~~~~~~~ main.cpp:98:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 98 | for(int i=0;i<a[z].size();i++) | ~^~~~~~~~~~~~