6xxmkd - Online C++0x Compiler & Debugging Tool

#include <iostream>
using namespace std;

const int MAX_LENGTH = 100;

int main() {
	int n, v[MAX_LENGTH + 1], w[MAX_LENGTH + 1];
	cin >> n;
	for (int i = 1; i <= n; ++i) {
		cin >> v[i];;
	}
	for (int i = 1; i <= n; ++i) {
		cin >> w[i];
	}

	for (int i = 1; i < n; ++i) {
		for (int j = i + 1; j <= n; ++j) {
			if (w[i] > w[j]) {
				int aux = w[i];
				w[i] = w[j];
				w[j] = aux;
			}
		}
	}

	int diference = 0;
	int flag = 1;
	for (int i = 1; i <= n; ++i) {
		diference = v[i] - w[i];
	}
	for (int i = 1; i <= n; ++i) {
		if (diference + w[i] != v[i]) {
			flag = 0;
		}
	}
	if (flag == 1) {
		cout << "DA\n" << diference;
	} else {
		cout << "NU\n" << diference;
	}
	return 0;
}