Mystery

#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
char a[200];
int b[800];
int main(void){
#ifndef ONLINE_JUDGE
  freopen("in", "r", stdin);
#endif
  int t; scanf("%d", &t);
  while (t--){
    int s; scanf("%d", &s);
    getchar();
    gets(a);
    int n; scanf("%d", &n);
    for (int i = 0; i < n; ++i) scanf("%d", b+i);
    printf("%d ", s);
    int po = 0, len = strlen(a);
    for (int i = 0; i < n; ++i) {
      po = po + b[i];
      if (po >= len) po = po % len;
      else if (po < 0) po = (po + len);
      printf("%c", a[po]);
    }
    printf("\n");
  }

  return 0;
}

题目不难，就是卡了很久，最后才发现，原来是输入的文件里面写错了，多打了一个空格……次奥……