Compilare: main.cpp: In function 'int main()': main.cpp:30:15: warning: unused variable 'x' [-Wunused-variable] int n, m, x, y, z, cost=0, k=0, j; ^ main.cpp:30:18: warning: unused variable 'y' [-Wunused-variable] int n, m, x, y, z, cost=0, k=0, j; ^ main.cpp:30:21: warning: unused variable 'z' [-Wunused-variable] int n, m, x, y, z, cost=0, k=0, j; ^ main.cpp:30:37: warning: unused variable 'j' [-Wunused-variable] int n, m, x, y, z, cost=0, k=0, j; ^