Compilare: main.cpp: In function 'int main()': main.cpp:13:25: warning: unused variable 'cost' [-Wunused-variable] long long n, m, pr, cost, i, j, nr=0, cump=0; ^~~~ main.cpp:13:37: warning: unused variable 'nr' [-Wunused-variable] long long n, m, pr, cost, i, j, nr=0, cump=0; ^~ main.cpp:13:43: warning: unused variable 'cump' [-Wunused-variable] long long n, m, pr, cost, i, j, nr=0, cump=0; ^~~~