Compilare: main.cpp: In function 'int main()': main.cpp:23:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(h = 0; h < a[m].size(); h++) | ~~^~~~~~~~~~~~~ main.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(h = 0; h < a[m].size(); h++) | ~~^~~~~~~~~~~~~ main.cpp:51:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(h = 0; h < a[m].size(); h++) | ~~^~~~~~~~~~~~~