Compilare: main.cpp: In function 'std::pair<int, int> find_min()': main.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | if (idx[j] < who[j].size()) | ~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'void baga(int, int)': main.cpp:41:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | while (idx[category] < who[category].size() and idx[category] < need) | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:104:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 104 | for (i = 0; i <= who[3].size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp:73:9: warning: 'j' may be used uninitialized [-Wmaybe-uninitialized] 73 | if (j == 2) | ^~ main.cpp:63:9: note: 'j' was declared here 63 | int j, i, n, s, k1, k2; | ^