Compilare: main.cpp: In function 'int main()': main.cpp:83:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | while(!val.empty() && t<=mr[1].size()) | ~^~~~~~~~~~~~~~ main.cpp:101:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | while(!val.empty() && t<=mr[i].size()) | ~^~~~~~~~~~~~~~ main.cpp:125:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 125 | while(!val.empty() && t<=mr[1].size()) | ~^~~~~~~~~~~~~~