Compilare: main.cpp: In function 'int main()': main.cpp:8:9: warning: unused variable 'pa' [-Wunused-variable] int pa, pb, a[50], n, k, i, j, b[50], aux, x, opt; ^~ main.cpp:8:13: warning: unused variable 'pb' [-Wunused-variable] int pa, pb, a[50], n, k, i, j, b[50], aux, x, opt; ^~ main.cpp:8:48: warning: unused variable 'x' [-Wunused-variable] int pa, pb, a[50], n, k, i, j, b[50], aux, x, opt; ^