1069. 微博转发抽奖(20)

利用map和s间隔计数输出,转自柳婼#include<bits/stdc++.h>
using namespace std;
int main()
{
int m,n,s;
//freopen("1069.txt","r",stdin);
cin>>m>>n>>s;
string str;map<string,int> Mp;
int flag=0;
for(int i=1;i<=m;i++)
{
cin>>str;
if(Mp[str]==1) s=s+1;
if(i==s&&Mp[str]==0)
{
Mp[str]=1;
cout<<str<<endl;
flag=1;s=s+n;
}
}
if(flag==0) cout<<"Keep going...";
return 0;
}