#include <stdio.h>
int main() {
int nilai;
if (scanf("%d", &nilai
) != 1) return 0;
if (nilai
>= 85 && nilai
<= 100) printf("Nilai huruf: A\n"); else if (nilai
>= 70 && nilai
<= 84) printf("Nilai huruf: B\n"); else if (nilai
>= 55 && nilai
<= 69) printf("Nilai huruf: C\n"); else if (nilai
>= 40 && nilai
<= 54) printf("Nilai huruf: D\n"); else if (nilai
>= 0 && nilai
< 40) printf("Nilai huruf: E\n"); else printf("Nilai tidak valid\n"); return 0;
}
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