Submission #1984082

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Source Code Expand

#include <algorithm>
#include <cmath>
#include <complex>
#include <iomanip>
#include <iostream>
#include <string>
#include <utility>
#include <vector>

using namespace std;

using ll = long long int;
const int MOD = 1e9 + 7;
const int INF = 1e9 + 373;

#define rep(i, n) for (int i = 0; i < (n); ++i)

template <typename T>
using vector2 = vector<vector<T>>;
template <typename T>
vector2<T> init_vector2(size_t n0, size_t n1, T e = T()) {
    return vector2<T>(n0, vector<T>(n1, e));
}

template <typename T>
using vector3 = vector<vector<vector<T>>>;
template <typename T>
vector3<T> init_vector3(size_t n0, size_t n1, size_t n2, T e = T()) {
    return vector3<T>(n0, vector2<T>(n1, vector<T>(n2, e)));
}

bool is_prime(ll n) {
    if (n <= 1) {
        return false;
    }
    if (n == 2) {
        return true;
    }
    if (n % 2 == 0) {
        return false;
    }
    for (ll i = 3; i * i <= n; i += 2) {
        if (n % i == 0) {
            return false;
        }
    }

    return true;
}

int main() {
    int n;
    cin >> n;

    int sum = n * (n + 1) / 2;
    cout << (is_prime(sum) ? "WANWAN" : "BOWWOW") << endl;
    return 0;
}

Submission Info

Judge Result