标签:png std int alt string src scan turn +=
#include <stdio.h>
#include <string.h>
int m,n,c;
int num[10001],flag[10001],pri[10001];
int get(int d) {
if(num[d] != -1) return num[d];
num[d] = -2;
int t = d,sum = 0;
while(t) {
sum += (t % 10) * (t % 10);
t /= 10;
}
t = get(sum);
if(t >= 0) flag[sum] = 1;
return num[d] = t == -2 ? t : t + 1;
}
int main() {
memset(num,-1,sizeof(num));
pri[0] = pri[1] = 1;
for(int i = 2;i * i <= 10000;i ++) {
if(pri[i]) continue;
for(int j = i * i;j <= 10000;j += i) {
pri[j] = 1;
}
}
num[1] = 0;
scanf("%d %d",&m,&n);
for(int i = m;i <= n;i ++) {
get(i);
}
for(int i = m;i <= n;i ++) {
if(num[i] != -2 && !flag[i]) {
printf("%d %d\n",i,num[i] * (2 - pri[i]));
c ++;
}
}
if(!c) printf("SAD");
return 0;
}
标签:png std int alt string src scan turn +=
原文地址:https://blog.51cto.com/14737345/2488112