X2

Author: Pakin Olanraktham

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View Problem Statement

Source: PROGRAMMING.IN.TH

Difficulty: Very Easy

Tags: Implementation, Math

Prerequisites:

• การเขียนโปรแกรมเบื้องต้น

View External Solution

เฉลย

เฉลย

CC++

#include <stdio.h>

int main(){
    int a, b;

    scanf("%d %d", &a, &b);

    printf("%d", 2*b - a);
}

#include <iostream>

using namespace std;

int main(){
    int a, b;

    cin >> a >> b;

    cout << 2*b - a;
}