题解 | 添加逗号
添加逗号
https://www.nowcoder.com/practice/f51c317e745649c0900996fd3f683aed
#include <iostream>
using namespace std;
#include<string>
#include<algorithm>
int main() {
string s,s1;
cin>>s;//980364535
reverse(s.begin(),s.end());//535463089
for(int i=1;i<=s.size();i++){
s1+=s[i-1];
if(i%3==0&&i!=s.size()){
s1.append(",");
}
}
reverse(s1.begin(),s1.end());
cout<<s1;
}
// 64 位输出请用 printf("%lld")
