Compilare: main.cpp: In function 'int MaxSumSubmatrix(std::vector<std::vector<int> >)': main.cpp:8:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | for(int l = 0; l < v.size(); l++){ | ~~^~~~~~~~~~ main.cpp:10:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for(int r = l; r < v.size(); r++){ | ~~^~~~~~~~~~ main.cpp:13:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i = 0; i < v.size(); i++){ | ~~^~~~~~~~~~