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,n) for(int i=0;i<n;i++)
using namespace std;

using ll = long long;
const ll MOD = 998244353;

int main() {
    int N;
    cin >> N;
    vector<int> a(N), b(N);
    ll asum = 0, bsum = 0;
    rep(i, N) {
        cin >> a[i];
        asum += a[i];
    }
    rep(i, N) {
        cin >> b[i];
        bsum += b[i];
    }
    int ac = 0, bc = 0;
    rep(i, N) {
        if (a[i] < b[i]) {
            if ((b[i] - a[i]) % 2) {
                ac += (b[i] - a[i] + 1) / 2;
                bc++;
            } else {
                ac += (b[i] - a[i]) / 2;
            }
        }
        if (a[i] > b[i]) bc++;
    }
    //cout << ac << " " << bc << " " << asum << " " << bsum << endl;
    if (bsum - asum < max(ac, bc)) cout << "No\n";
    else cout << "Yes\n";
}