#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int N = 100010;
#define x first
#define y second
typedef pair<int,int> PII;
int n,d,k;
PII logs[N];
bool st[N];
int cnt[N];//用来记录一个id获得的赞数
int main()
{
    scanf("%d%d%d",&n,&d,&k);
    for(int i = 0;i < n;i++) scanf("%d%d",&logs[i].x,&logs[i].y);
    sort(logs,logs + n);//默认按时间x排序
    for(int i = 0,j = 0;i < n;i++)//i在前，j在后
    {
        int t = logs[i].y;
        cnt[t]++;
        while(logs[i].x - logs[j].x >= d)//如果时间段超过d
        {
            cnt[logs[j].y]--;
            j++;
        }
        if(cnt[t] >= k) st[t] = true;
    }
    for(int i = 0;i < 100000;i++) 
        if(st[i])
            printf("%d\n",i);
    return 0;
}