[CodeUp] #4051-시간외 근무 수당(정올 1번 수준 문제)

#include <iostream>
using namespace std;

double check(double a,double b){
    if((b-a-1)<=0){
        return 0;
    }
    else if((b-a-1)>4){
        return 4;
    }
    else{
        return b-a-1;
    }
}


int main(){
    double arr[6][2];
    double sum = 0;
    for(int i=0;i<5;i++){
        cin >> arr[i][0] >> arr[i][1];
    }

    for(int i=0;i<5;i++){
        if(check(arr[i][0],arr[i][1])){
            //cout << check(arr[i][0],arr[i][1]) << "\n";
            sum += check(arr[i][0],arr[i][1]);
        }
    }

    if(sum>=15){
        sum = sum/0.5*5000;
        sum *= 0.95;
    }
    else if(sum <=5){
        sum = sum/0.5*5000;
        sum *=1.05;
    }
    else{
        sum = sum/0.5*5000;
    }

    cout << sum;

}