猝死的程序猿

#include <iostream>#include <algorithm>#include <cstring>#include <cstdio>using namespace std;

int f(int x){    int tmp;    while(x>=10){        tmp=0;        while(x>0){            tmp=tmp+x%10;            x=x/10;        }        x=tmp;    }    return x;}int main(){    int ri,rep,n,i,sum;    scanf("%d",&rep);    while(rep--){        scanf("%d",&n);        sum=0;        for(i=1;i<=n;i++){            sum=(sum+f(i))%10000;        }        PRintf("%d/n",sum);    }    return 0;}