英雄会-----报数游戏(3) - crazy_jack - 博客频道 - CSDN.NET


英雄会-----报数游戏(3) - crazy_jack - 博客频道 - CSDN.NET
一种报数游戏是从1开始连续报数,如果报到7的倍数(7,14,21,28……)
或者包含数字7的数(7,17,27,37……)就用拍手代替这个数而不能报出。
假设你连续听到m声拍手,问造成你听到m声拍手的第一下拍手所代表的数是几?
例如,你听到了两次连续的拍手,最小的可能这两次拍手是27和28,因此输出27。
输入m, 输出这m次连续的拍手第一下所代表的最小可能的数。
int Seven(int num) //包含数字7
{
    while (num > 0)
    {
        if (num % 10 == 7) return 1;
        num /= 10;
    }
    return 0;
}

int number (int m)
{
    int start = 1;  //由1开始
    int count = 0;  //连续的个数
    int n = start;  //初始点

    while (count < m) //连续的个数
    {
        if (start % 7 == 0 || Seven(start) == 1)
        {
            if (count == 0) //重新计数,修改初始n
            {
                n = start;
            }
            count++;
        }
        else
            count = 0;  //非连续

        start++;
    }

    return n;
}
 private static boolean isStopNum(int num) {
  if (num < 1) {
   return false;
  }
  if ((num % 7 == 0) || (String.valueOf(num).indexOf("7") != -1)){
   return true;
  }
  return false;
 }
 public static int getMinNum(int count) {
  if (count < 1) {
   return 0;
  }
  int minCount = 0; //保存连续isStopNum的数字个数
  for(int i = 1; i < Character.MAX_VALUE; i++) {
   if (isStopNum(i)) {
    minCount++;
    if (minCount == count) {
     return i - count + 1;
    }
   } else {
    minCount = 0;
   }
  }
  return 0;
 }
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