a = 10; for( i=1; i<=3; i++ ) a -= 2;
a = 10; for ( i=0; i<=3; i++ ) a -= i;
a = 2; for ( i=0; i<=3; i++ ) a += i;
a = 4; for ( i=1; i<=2; i++ ) a += a;
for ( i=3; i>=0; i-- ) cout << i;
cout << 4; for ( i=3; i>=2; i-- ) cout << 2*i;
cout << 1; for ( i=2; i<=0; i++ ) cout << i;