poj 3750 小孩报数问题

#include<iostream>
#include<string>
#include <vector>
using namespace std;
struct Node 
{
    int index;
    string str;
    Node(int i,string s)
    {
        index=i;str=s;
    }
};
vector<Node> table;
int main()
{
    int n,w,s,i,ans;
    string str;
    cin>>n;
    for (i=1;i<=n;++i)
    {
        cin>>str;
        Node node(i,str);
        table.push_back(node);
    }
    scanf("%d,%d",&w,&s);
    w--;
    while(!table.empty())
    {
        ans=(w+s-1)%table.size();
        cout<<table[ans].str<<endl;
        w=(ans==table.size()-1)?0:ans;
        table.erase(table.begin()+ans);
    }
    return 0;
}