替换成什么字符，比如我用的::::，要试出来

#include<iostream>
using namespace std;
int n;
string a[105];
int main(){
    scanf("%d",&n);
    for(int i=1;i<=n;i++) cin >> a[i];
    int m;scanf("%d",&m);
    getchar();
    string s;getline(cin,s);
    int cnt=0;
    for(int i=1;i<=n;i++){
        while(s.find(a[i])!=-1){
            cnt++;
            s.replace(s.find(a[i]),a[i].size(),"::::");
        }
    }
    if(cnt>=m){
        cout << cnt << endl << "He Xie Ni Quan Jia!";
    }
    else{
        while(s.find("::::")!=-1){
            s.replace(s.find("::::"),4,"<censored>");
        }
        cout << s;
    }
    return 0;
}