Complie Error 求调

#include<bits/stdc++.h>
using namespace std;
bool coin[200001];
int n,m,begin,end;
int main(){
	scanf("%d%d",&n,&m);
	while(m--){
		scanf("%d%d",&begin,&end);
		for(int i = begin;i<=end;i++)coin[i]?coin[i] = false:coin[i] = true;
	}
	for(int i = 1;i<=n;i++){
		if(coin[i])printf("1");
		else printf("0");
	}
	return 0;
}