729D - Sea Battle - CodeForces Solution

import sys
input = sys.stdin.readline
def mp():return list(map(int,input().split()))
def it():return int(input())
import math

mod=10**9+7

def solve():
    n,a,b,k=mp()
    s=input().strip()
    tmp,ans=0,[]
    for i in range(n):
        if s[i]=='1':
            tmp=0
        else:
            tmp+=1
            if tmp==b:
                ans.append(i+1)
                tmp=0
    ret=len(ans)-(a-1)
    print(ret)
    print(" ".join(map(str,ans[:ret])))

    return

if __name__ == '__main__':

                
                solve()