158B codeforces - Taxi

158B codeforces

Taxi

Solution in c++

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

    int p,all=0,ans=0,i1=0,i2=0,i3=0;

    cin>>p;

    for(int i=0;i<p;i++){

        int t;

        cin>>t;

        if(t==4)ans++;

        else if(t==3)i3++;

        else if(t==2)i2++;

        else if(t==1)i1++;

    }

        ans+=min(i1,i3);

        int y=min(i1,i3);

        i1-=y;

        i3-=y;

        ans+=i2/2;

        i2=i2%2;

        ans+=min(i2,i1/2);

        y=min(i2,i1/2);

        i2-=y;

        i1-=2*y;

    if(i2==1 && i1>=0){

        ans++;

        i2--;

        i1--;

    }

    ans+=ceil(i1/4.0);

    ans+=i3;

    cout<<ans<<"\n";

    return 0;

}

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About Mohamed Sobhi

My name is Mo.Sobhy ,I study at School excelling high school in Ain Shams ,Cairo
My hobbies is programming ,and web development ,playing chess and writing horror stories.