Compilare: main.cpp: In function 'void prec(int)': main.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(i = 0; i < graf[nod].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void DFS(int, int)': main.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(i = 0; i < graf[nod].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:15: warning: unused variable 'j' [-Wunused-variable] 48 | int n, i, j, k, a, b, mn; | ^ main.cpp:48:18: warning: unused variable 'k' [-Wunused-variable] 48 | int n, i, j, k, a, b, mn; | ^