Problem:
Score : 300 points

Problem Statement

You are given two integer sequences of length N: a_1,a_2,..,a_N and b_1,b_2,..,b_N.
Determine if we can repeat the following operation zero or more times so that the sequences a and b become equal.

Operation: Choose two integers i and j (possibly the same) between 1 and N (inclusive), then perform the following two actions simultaneously:

Add 2 to a_i.

Add 1 to b_j.

Constraints

1 ≤ N ≤ 10 000

0 ≤ a_i,b_i ≤ 10^9 (1 ≤ i ≤ N)

All input values are integers.

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 .. a_N
b_1 b_2 .. b_N

Output

If we can repeat the operation zero or more times so that the sequences a and b become equal, print Yes; otherwise, print No.

Sample Input 1

3
1 2 3
5 2 2

Sample Output 1

Yes

For example, we can perform three operations as follows to do our job:

First operation: i=1 and j=2. Now we have a = \{3,2,3\}, b = \{5,3,2\}.

Second operation: i=1 and j=2. Now we have a = \{5,2,3\}, b = \{5,4,2\}.

Third operation: i=2 and j=3. Now we have a = \{5,4,3\}, b = \{5,4,3\}.

Sample Input 2

5
3 1 4 1 5
2 7 1 8 2

Sample Output 2

No

Sample Input 3

5
2 7 1 8 2
3 1 4 1 5

Sample Output 3

No

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include "bits/stdc++.h"
#define rep(i,a,n) for(int i = (a);i < (n);i++)
typedef unsigned long long ull;
typedef long long ll;
using namespace std;

int main(){
	ll n;
	cin >> n;
	ll a[n],b[n],memoa = 0,memob = 0,memo = 0;
	rep(i,0,n){
		cin >> a[i];
	}
	rep(i,0,n){
		cin >> b[i];
	}
	
	rep(i,0,n){
		a[i] += 2*memoa;
		b[i] += memob;
		memoa = 0;
		memob = 0;
		
		if(i == n-1){
			
			if((a[i] > b[i] || abs(b[i]-a[i]) % 2 == 0) && a[i] != b[i]){
				cout << "No" << endl;
				return 0;
			}
			else{
				cout << "Yes" << endl;
				return 0;
			}
		}
		else{
			if(a[i] > b[i]){
				memoa = a[i] - b[i];
			}
			else if(a[i] < b[i]){
				if((b[i] - a[i]) % 2){ 
					memob = (b[i] - a[i]) / 2 ;
				}
				else{
					memob = (b[i] - a[i]) / 2;
				}
			}
		}
		//cout << memoa << " " << memob << " " << a[i] << " " << b[i]<< endl;
		
	}
	
	return 0;
}