結果

問題 No.1665 quotient replace
ユーザー leaf_1415leaf_1415
提出日時 2021-09-03 21:33:46
言語 C++11
(gcc 11.4.0)
結果
AC  
実行時間 1,786 ms / 3,000 ms
コード長 6,913 bytes
コンパイル時間 1,233 ms
コンパイル使用メモリ 107,012 KB
実行使用メモリ 125,572 KB
最終ジャッジ日時 2024-05-09 02:17:55
合計ジャッジ時間 79,311 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 1,650 ms
121,544 KB
testcase_01 AC 1,623 ms
121,600 KB
testcase_02 AC 1,685 ms
121,544 KB
testcase_03 AC 1,661 ms
121,600 KB
testcase_04 AC 1,695 ms
121,544 KB
testcase_05 AC 1,624 ms
121,728 KB
testcase_06 AC 1,692 ms
121,548 KB
testcase_07 AC 1,654 ms
121,600 KB
testcase_08 AC 1,669 ms
121,544 KB
testcase_09 AC 1,617 ms
121,728 KB
testcase_10 AC 1,698 ms
122,824 KB
testcase_11 AC 1,756 ms
124,544 KB
testcase_12 AC 1,712 ms
121,924 KB
testcase_13 AC 1,786 ms
125,440 KB
testcase_14 AC 1,693 ms
125,572 KB
testcase_15 AC 1,677 ms
125,440 KB
testcase_16 AC 1,683 ms
125,444 KB
testcase_17 AC 1,659 ms
125,444 KB
testcase_18 AC 1,534 ms
121,672 KB
testcase_19 AC 1,569 ms
121,600 KB
testcase_20 AC 1,576 ms
121,544 KB
testcase_21 AC 1,618 ms
121,600 KB
testcase_22 AC 1,603 ms
121,548 KB
testcase_23 AC 1,614 ms
121,544 KB
testcase_24 AC 1,618 ms
121,544 KB
testcase_25 AC 1,591 ms
121,600 KB
testcase_26 AC 1,568 ms
121,544 KB
testcase_27 AC 1,571 ms
121,600 KB
testcase_28 AC 1,590 ms
121,676 KB
testcase_29 AC 1,625 ms
121,856 KB
testcase_30 AC 1,654 ms
123,720 KB
testcase_31 AC 1,688 ms
124,544 KB
testcase_32 AC 1,656 ms
124,488 KB
testcase_33 AC 1,608 ms
122,624 KB
testcase_34 AC 1,618 ms
123,848 KB
testcase_35 AC 1,589 ms
123,648 KB
testcase_36 AC 1,619 ms
123,720 KB
testcase_37 AC 1,647 ms
123,520 KB
testcase_38 AC 1,664 ms
123,908 KB
testcase_39 AC 1,627 ms
123,264 KB
testcase_40 AC 1,632 ms
123,340 KB
testcase_41 AC 1,605 ms
123,204 KB
testcase_42 AC 1,565 ms
121,600 KB
testcase_43 AC 1,569 ms
121,544 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <cassert>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <bitset>
#include <string>
#include <algorithm>
#include <utility>
#include <complex>
#include <unordered_set>
#include <unordered_map>
#define rep(x, s, t) for(ll x = (s); (x) <= (t); (x)++)
#define per(x, s, t) for(ll x = (s); (x) >= (t); (x)--)
#define reps(x, s) for(ll x = 0; (x) < (ll)(s).size(); (x)++)
#define chmin(x, y) (x) = min((x), (y))
#define chmax(x, y) (x) = max((x), (y))
#define sz(x) ((ll)(x).size())
#define ceil(x, y) (((x)+(y)-1) / (y))
#define all(x) (x).begin(),(x).end()
#define outl(...) dump_func(__VA_ARGS__)
#define outf(x) cout << fixed << setprecision(16) << (x) << endl
#define inf 1e18
const double PI = 3.1415926535897932384626433;

using namespace std;

typedef long long llint;
typedef int ll;
typedef pair<ll, ll> P;

struct edge{
	ll to, cost;
	edge(){}
	edge(ll a, ll b){ to = a, cost = b;}
};
const int dx[] = {1, 0, -1, 0}, dy[] = {0, -1, 0, 1};

const int mod = 1000000007;
//const int mod = 998244353;

struct mint{
	int x;
	mint(ll y = 0){if(y < 0 || y >= mod) y = (y%mod+mod)%mod; x = y;}
	mint(const mint &ope) {x = ope.x;}
	
	mint operator-(){return mint(-x);}
	mint operator+(const mint &ope){return mint(x) += ope;}
	mint operator-(const mint &ope){return mint(x) -= ope;}
	mint operator*(const mint &ope){return mint(x) *= ope;}
	mint operator/(const mint &ope){return mint(x) /= ope;}
	mint& operator+=(const mint &ope){
		x += ope.x;
		if(x >= mod) x -= mod;
		return *this;
	}
	mint& operator-=(const mint &ope){
		x += mod - ope.x;
		if(x >= mod) x -= mod;
		return *this;
	}
	mint& operator*=(const mint &ope){
		ll tmp = x;
		tmp *= ope.x, tmp %= mod;
		x = tmp;
		return *this;
	}
	mint& operator/=(const mint &ope){
		ll n = mod-2; mint mul = ope;
		while(n){
			if(n & 1) *this *= mul;
			mul *= mul;
			n >>= 1;
		}
		return *this;
	}
	mint inverse(){return mint(1) / *this;}
	bool operator ==(const mint &ope){return x == ope.x;}
	bool operator !=(const mint &ope){return x != ope.x;}
	bool operator <(const mint &ope){return x < ope.x;}
};
mint modpow(mint a, ll n){
	if(n == 0) return mint(1);
	if(n % 2) return a * modpow(a, n-1);
	else return modpow(a*a, n/2);
}
istream& operator >>(istream &is, mint &ope){
	ll t; is >> t, ope.x = t;
	return is;
}
ostream& operator <<(ostream &os, mint &ope){return os << ope.x;}
ostream& operator <<(ostream &os, const mint &ope){return os << ope.x;}

vector<mint> fact, fact_inv;
void make_fact(int n){
	fact.resize(n+1), fact_inv.resize(n+1);
	fact[0] = mint(1); rep(i, 1, n) fact[i] = fact[i-1] * mint(i);
	fact_inv[n] = fact[n].inverse(); per(i, n-1, 0) fact_inv[i] = fact_inv[i+1] * mint(i+1);
}
mint comb(int n, int k){ if(n < 0 || k < 0 || n < k) return mint(0); return fact[n] * fact_inv[k] * fact_inv[n-k];}
mint perm(int n, int k){ return comb(n, k) * fact[k]; }

vector<int> prime, pvec;
void make_prime(int n){
	prime.resize(n+1);
	rep(i, 2, n){
		if(prime[i]) continue;
		for(int j = i; j <= n; j+=i) prime[j] = i;
	}
	rep(i, 2, n) if(prime[i] == i) pvec.push_back(i);
}

bool exceed(ll x, ll y, ll m){return x >= m / y + 1;}
void mark(){ cout << "*" << endl; }
void yes(){ cout << "YES" << endl; }
void no(){ cout << "NO" << endl; }
ll sgn(ll x){ if(x > 0) return 1; if(x < 0) return -1; return 0;}
ll gcd(ll a, ll b){if(b == 0) return a; return gcd(b, a%b);}
ll lcm(ll a, ll b){return a/gcd(a, b)*b;}
ll digitnum(ll x, ll b = 10){ll ret = 0; for(; x; x /= b) ret++; return ret;}
ll digitsum(ll x, ll b = 10){ll ret = 0; for(; x; x /= b) ret += x % b; return ret;}
string lltos(ll x){string ret; for(;x;x/=10) ret += x % 10 + '0'; reverse(ret.begin(), ret.end()); return ret;}
ll stoll(string &s){ll ret = 0; for(auto c : s) ret *= 10, ret += c - '0'; return ret;}
template<typename T>
void uniq(T &vec){ sort(vec.begin(), vec.end()); vec.erase(unique(vec.begin(), vec.end()), vec.end());}

template<class S, class T> pair<S, T>& operator+=(pair<S,T> &s, const pair<S,T> &t){
	s.first += t.first, s.second += t.second;
	return s;
}
template<class S, class T> pair<S, T>& operator-=(pair<S,T> &s, const pair<S,T> &t){
	s.first -= t.first, s.second -= t.second;
	return s;
}
template<class S, class T> pair<S, T> operator+(const pair<S,T> &s, const pair<S,T> &t){
	return pair<S,T>(s.first+t.first, s.second+t.second);
}
template<class S, class T> pair<S, T> operator-(const pair<S,T> &s, const pair<S,T> &t){
	return pair<S,T>(s.first-t.first, s.second-t.second);
}
template<typename T>
ostream& operator << (ostream& os, vector<T>& vec) {
	for(int i = 0; i < vec.size(); i++) os << vec[i] << (i + 1 == vec.size() ? "" : " ");
	return os;
}
template<typename T>
ostream& operator << (ostream& os, deque<T>& deq) {
	for(int i = 0; i < deq.size(); i++) os << deq[i] << (i + 1 == deq.size() ? "" : " ");
	return os;
}
template<typename T, typename U>
ostream& operator << (ostream& os, pair<T, U>& pair_var) {
	os << "(" << pair_var.first << ", " << pair_var.second << ")";
	return os;
}
template<typename T, typename U>
ostream& operator << (ostream& os, const pair<T, U>& pair_var) {
	os << "(" << pair_var.first << ", " << pair_var.second << ")";
	return os;
}
template<typename T, typename U>
ostream& operator << (ostream& os, map<T, U>& map_var) {
	for(typename map<T, U>::iterator itr = map_var.begin(); itr != map_var.end(); itr++) {
		os << "(" << itr->first << ", " << itr->second << ")";
		itr++; if(itr != map_var.end()) os << ","; itr--;
	}
	return os;
}
template<typename T>
ostream& operator << (ostream& os, set<T>& set_var) {
	for(typename set<T>::iterator itr = set_var.begin(); itr != set_var.end(); itr++) {
		os << *itr; ++itr; if(itr != set_var.end()) os << " "; itr--;
	}
	return os;
}
template<typename T>
ostream& operator << (ostream& os, multiset<T>& set_var) {
	for(typename multiset<T>::iterator itr = set_var.begin(); itr != set_var.end(); itr++) {
		os << *itr; ++itr; if(itr != set_var.end()) os << " "; itr--;
	}
	return os;
}
template<typename T>
void outa(T a[], ll s, ll t){rep(i, s, t){ cout << a[i]; if(i < t) cout << " ";}cout << endl;}
void dump_func(){cout << endl;}
template <class Head, class... Tail>
void dump_func(Head &&head, Tail &&... tail) {
	cout << head;
	if(sizeof...(Tail) > 0) cout << " ";
	dump_func(std::move(tail)...);
}

ll n;
ll a[1000005];
vector<ll> vec[1000005];
ll dp[1000005];

int main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	rep(i, 1, 1000000){
		for(int j = 2*i; j <= 1000000; j+=i) vec[j].push_back(i);
	}
	
	cin >> n;
	rep(i, 1, n) cin >> a[i];
	
	rep(i, 1, 1000000){
		set<ll> S;
		for(auto x : vec[i]) S.insert(dp[x]);
		while(S.count(dp[i])) dp[i]++;
	}
	
	ll ans = 0;
	rep(i, 1, n) ans ^= dp[a[i]];
	if(ans == 0) outl("black");
	else outl("white");
	
	return 0;
}
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