---

#include <stdio.h>

int main()
{
    int A = 5;
    int B = 5;
    int C = 9;
    int R;

    if (A == B)
        R = C;
    else if (A == C)
        R = B;
    else
        R = A;

    printf("Отличающееся значение = %d", R);

    return 0;
}