Codechef Matched Brackets Problem Code: ZCO12001

#include <iostream>
#include <vector>

using namespace std;
int main(){
int mx=-1,pos=0,len=0,p2=0,l=0,r=0,curmx=0,curlen=0;
int n,N;
cin>>n;
N=n;
while(n--){
  curlen++;
  int a;
  cin>>a;
  if(a==1)l++;
  else l--;
  if(l>mx){
    mx=l;
    pos=N-n;
  }
  else if(l==0){
    if(curlen>len){len=curlen,p2=N-n-curlen+1;}
    curlen=0;
  }
}
cout<<mx<<' '<<pos<<' '<<len<<' '<<p2<<endl;
}