Compilare: user.cpp: In function ‘int main()’: user.cpp:7:20: warning: unused variable ‘a’ [-Wunused-variable] int s=0, n, m, a[10000][10000], i, j, x; ^ user.cpp:7:37: warning: unused variable ‘i’ [-Wunused-variable] int s=0, n, m, a[10000][10000], i, j, x; ^ user.cpp:7:40: warning: unused variable ‘j’ [-Wunused-variable] int s=0, n, m, a[10000][10000], i, j, x; ^