Compilare: main.cpp: In function 'int main()': main.cpp:33:29: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 33 | for(int t = 1; v.size() < n * m; t++) | ~~~~~~~~~^~~~~~~ main.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int i = 1; i < v.size() - 1; i++) | ~~^~~~~~~~~~~~~~