题解 | 找位置

#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<set>
using namespace std;

int main()
{
    string s;
    cin>>s;
    for(int i=0;i<s.size();i++)
    {
        vector<int> arr;
        if(s[i]=='*') continue;
        arr.push_back(i);
        for(int j=i+1;j<s.size();j++)
        {
            if(s[i]==s[j])
            {
               arr.push_back(j);
               s[j]='*';
            }
        }

        if(arr.size()>1)
        {
            int count=0;
            for(int a:arr)
            {
                if(count<arr.size()-1)
                {
                    cout<<s[i]<<":"<<a<<",";
                }
                else
                {
                    cout<<s[i]<<":"<<a;
                }
                count++;
            }
            cout<<endl;
        }
    }

    return 0;
}