#include <stdio.h>
main()
{
int a, b, c, d;
scanf("%d%d%d", &a
, &b
, &c
); switch (c) {
case 0:
d = a + b; break;
case 1:
d = a - b; break;
case 2:
d = a * b; break;
case 3:
d = a / b; break;
case 4:
d = a % b; break;
default:
d = 0;
}
}
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