// n쓰기 싫은데ㅠ
#include <stdio.h>
int main() {
int S[] = {10, 7, 11, 5, 13, 8};
int n = 6;
int a;
int i = 0;
scanf("%d", &a);
while (a != S[i]) {
i++;
}
if (a == S[i]) {
printf("%d", i + 1);
}
return 0;
}
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