抱灵need help

#include<bits/stdc++.h>
using namespace std;

string s;
int find(int i){
	stack<bool> a;
	a.push(0);
	while(i++){
		if(s[i]=='[') a.push(0);
		else if(s[i]==']') a.pop();
		if(a.empty()) return i;
	}
}
int dfs(int h,int t)
{
	if(isdigit(s[h])){
		for(int j=1;j<=s[h]-'0';j++)
			for(int i=h+1;i<=t-1;i++){
				if(s[i]!='[') cout<<s[i];
				else{
					dfs(i+1,find(i));
					i=find(i)+1;
				}
			}
	}
	else{
		for(int i=h;i<=t;i++){
			if(s[i]!='[') cout<<s[i];
			else{
				dfs(i+1,find(i));
				i=find(i)+1;
			}
		}
	}
}
int main()
{
	cin>>s;
	dfs(0,s.length()-1);
	return 0;
} 

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