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1255 A.cpp
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/**
* Git >> Mohsin_Riad
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**/
#include<bits/stdc++.h>
using namespace std;
#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define mx 1000
#define endl "\n"
#define pb push_back
#define pob pop_back
typedef long long ll;
typedef double dd;
const int N = 1e5;
int main()
{
IOS
int n, arr[] = {5,2,1};
cin>>n;
ll a, b, cnt;
while(n--)
{
ll temp=0, remain;
cin>>a>>b;
ll cnt = abs(a-b);
if(a==b) cout<<"0"<<endl;
else
{
for(int i=0; i<=2 ;i++)
{
remain = cnt / arr[i];
temp += remain;
cnt %= arr[i];
}
cout<<temp<<endl;
}
}
return (0);
}