Getting Error in this program: Checking if two array equal? - c++

Question

While compiling the program an error is popping up which I'm not able to figure out what it is: "No matching function call to _distance_fw(int&,int&)".
Here in this problem I'm trying to check if two arrays are equal in terms of the values they contain.
#include<iostream>
#include<algorithm>
#include<unordered_map>
using namespace std;
unordered_map<int,int> bucket;
unordered_map<int,int>::const_iterator it;
int main()
{
int T,N,val,counter;
int def=1;
bool bug;
scanf("%d",&T);
{
for(int i=0;i<T;i++)
{
scanf("%d",&N); //N is the size of array
counter=N;
bucket.erase(bucket.begin(),bucket.end());
for(int j=0;j<2;j++)
//scanning the first array
{
while(counter>0)
{
if(j==0)
{
scanf("%d",&val);
it=bucket.find(val);
if(it==bucket.end())
{
bucket.insert(val,def);
}
else
{
bucket[val]++;
}
}
else
{
scanf("%d",&val);
it=bucket.find(val);
if(it!=bucket.end())
{
bucket[val]--;
}
else
{
bug=true;
}
}
counter--;
}
if(bug==true)
{
cout<<"0"<<endl;
}
else
{
for(it=bucket.begin();it!=bucket.end();it++)
{
if(it->second!=0)
{
cout<<"0"<<endl;bug=true;break;
}
}
if(bug==false)
{
cout<<"1"<<endl;
}
}
}
}
}
}

Answer 1

You simply need to change
bucket.insert(val,def)
Into:
bucket.insert({val,def})
std::unordered_map::insert needs a std::unordered_map::value_type which in this case is std::pair<const int int>.
And please format your code better.