2020-02-13

/* 判斷一個數是否是素數*/# include <stdio.h>int IsPrime(int val){ int i; for (i=2; i<val; ++i) { if (val%i == 0) break; } if (i == val) return 1; else return 0;}int main(void){ int m; scanf("%d", &m); if ( IsPr

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