CDOJ 1272 Final Pan's prime numbers
有些问题,不做实践与猜测,可能一辈子也想不出答案,例如这题。
#include<stdio.h>
#include<math.h> long long x; int main()
{
while(~scanf("%lld",&x)){
if(x<) printf("-1\n");
else printf("7\n");
}
return ;
}
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