Compilare: main.cpp: In function 'int main()': main.cpp:72:29: warning: unused variable 'k' [-Wunused-variable] 72 | int k = n * (i - 1) + j + 2; | ^ main.cpp:97:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for(int j = 1;j < lin[i].size();j++) | ~~^~~~~~~~~~~~~~~ main.cpp:102:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for(int j = 1;j < col[i].size();j++) | ~~^~~~~~~~~~~~~~~