ACM 10550 - Combination Lock

#include <stdio.h>

int main()
{
    int pw1, pw2, pw3, startNum, sum;
    while (1)
    { 
        scanf("%d %d %d %d",&startNum, &pw1, &pw2, &pw3);
        if (startNum == 0 && pw1 == 0 && pw2 == 0 && pw3 == 0) break;
        sum = 720 + 360;
        
        if (startNum >= pw1) sum += (startNum - pw1) * 9;
        else if (startNum < pw1) sum += (startNum + 40 - pw1) * 9;
        
        if (pw1 > pw2) sum += (40 - pw1 + pw2) * 9;
        else if (pw1 <= pw2) sum += (pw2 - pw1) * 9;
        
        if (pw2 >= pw3) sum += (pw2 - pw3) * 9;
        else if (pw2 <= pw3) sum += (40 - pw3 + pw2) * 9;
        
        printf("%d\n", sum);
                   
    }
    return 0;
}

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