poj 2656 Unhappy Jinjin

#include <stdio.h>int main(){    while(1)    {        int i, n;        int maxday, maxvalue = -1;        scanf("%d", &n);        if (n == 0) break;        for (i = 1; i <= n; i++)        {            int a, b;            scanf("%d%d", &a, &b);            if (a + b > maxvalue)            {                maxvalue = a + b;                maxday = i;            }        }        if (maxvalue <= 8) printf("0\n");        else printf("%d\n", maxday);    }    return 0;}