Compilare: main.cpp: In function 'int check(int)': main.cpp:72:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(j=0;j<qu[i].size();j++) | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:95:13: warning: unused variable 'j' [-Wunused-variable] 95 | int n,i,j,k,l,a,b,w,sumtot=0; | ^ main.cpp:95:15: warning: unused variable 'k' [-Wunused-variable] 95 | int n,i,j,k,l,a,b,w,sumtot=0; | ^ main.cpp:95:17: warning: unused variable 'l' [-Wunused-variable] 95 | int n,i,j,k,l,a,b,w,sumtot=0; | ^