Help me in solving HCAGMAM1 problem

help
,
1

My issue

find mistake

My code

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

int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--)
	{
	    int x,y;
	    cin>>x>>y;
	    string a;
	    cin>>a;
	    int c1=0,max=0,streak=0;
	    for(int i=0;i<a.length();i++)
	    {
	        if(a[i]=='1')
	        {
	            c1++;
	        }
	    }
	    for(int i=0;i<a.length();i++)
	    {
	        if(a[i]=='1' && a[i+1]=='1')
	        {
	            streak++;
	        }
	        else
	        {
	            streak=1;
	        }
	        max=((max<=streak)?streak:max);
	    }
	    cout<<c1*x+max*y<<endl;
	}
}

Problem Link: Chef And Salary Pay Practice Coding Problem