Compilare: main.cpp: In function 'int hamiltonian(int)': main.cpp:15:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int e = 0; e < pct[nivel - 1].size(); e++){ | ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:9: warning: unused variable 'n' [-Wunused-variable] 37 | int n,i,j,T,nivel = 1,x,y; | ^ main.cpp:37:11: warning: unused variable 'i' [-Wunused-variable] 37 | int n,i,j,T,nivel = 1,x,y; | ^ main.cpp:37:13: warning: unused variable 'j' [-Wunused-variable] 37 | int n,i,j,T,nivel = 1,x,y; | ^