题解 | #从1到n整数中1出现的次数# 毫无感情，硬解
整数中1出现的次数（从1到n整数中1出现的次数）
https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6
public class Solution {
public int NumberOf1Between1AndN_Solution(int n) {
StringBuilder sp = new StringBuilder();
for (int i = 1; i <= n; i++) {
sp.append(i);
}
String str = sp.toString();
int mi = str.replaceAll("1", "").length();
int max = str.length() - mi;
return max;
}
}
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