Compilare: main.cpp: In function 'int main()': main.cpp:2336:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 2336 | for(j=0;j<cost[i].size();j++) | ~^~~~~~~~~~~~~~~ main.cpp:2320:15: warning: unused variable 'k' [-Wunused-variable] 2320 | int n,i,j,k,l,x,gc,a,b; | ^ main.cpp:2320:17: warning: unused variable 'l' [-Wunused-variable] 2320 | int n,i,j,k,l,x,gc,a,b; | ^ main.cpp:2320:21: warning: unused variable 'gc' [-Wunused-variable] 2320 | int n,i,j,k,l,x,gc,a,b; | ^~