Codechef July Starters 7

Date- 25 July 2021
Time – 16:00 IST
Duration – 3 Hours

1. Chess Format

#include <iostream>
using namespace std;

int main() {
	int t;
	cin>>t;
	int a,b;
	while(t--)
	{
	    cin>>a>>b;
	    a=a+b;
	    if(a<3)
	    cout<<"1\n";
	    else if(a<=10)
	    cout<<"2\n";
	    else if(a<=60)
	    cout<<"3\n";
	    else cout<<"4\n";
	}
	return 0;
}

2. Food Chain

#include <iostream>
using namespace std;

int main() {
	long long t;
	cin>>t;
	while(t--)
	{
	    long long e,k;
	    cin>>e>>k;
	    long long i=0;
	    while(e!=0)
	    {
	        i++;
	        e=e/k;
	    }
	    cout<<i<<"\n";
	}
	return 0;
}

3. Maximum Array Xor

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

int main() {
	long long t;
	cin>>t;
	while(t--)
	{
	    int n;
	    long long k;
	    cin>>n>>k;
	    if(k>(long long)pow(2,n-1))
	    k=(long long)pow(2,n-1);
	    long long x=(long long)pow(2,n);
	    x--;
	    x*=2;
	    x*=k;
	    cout<<x<<"\n";
	}
	return 0;
}

4. Ceiling Sum

#include <iostream>
#include <bits/stdc++.h>
#define ll long long
using namespace std;

int main() {
	ll t;
	cin>>t;
	while(t--)
	{
	    ll a,b,ans;
	    cin>>a>>b;
	    if(a==b)
	    ans=0;
	    else if(a>b)
	    {
	        a=b-a;
	        if(a%2==0)
	        a=a/2+1;
	        else a=a/2;
	        ans=a;
	    }
	    else
	    {
	        b=b-a;
	        b/=2;
	        b++;
	        ans=b;
	    }
	    cout<<ans<<"\n";
	}
	return 0;
}

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