#include <iostream>

int main() {
   int n, k, l, f;
   std::cin >> n >> k >> l >> f;
   int nr = 0, curStart = -1, curEnd = -1;
   for(int i = 0; i < n; i++) {
      int x;
      std::cin >> x;
      if(x <= f && i - curEnd == l) {
         curStart = -1;
         curEnd = -1;
      }
      if(x > f) {
         if(curStart == -1) {
            curStart = i;
            curEnd = i;
         }
         else
            curEnd++;
         if(curEnd - curStart + 1 == k)
            nr++;
      }
      
   }
   std::cout << nr;
}