結果

問題 No.1665 quotient replace
ユーザー siro53
提出日時 2021-09-03 22:26:17
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 253 ms / 3,000 ms
コード長 2,795 bytes
コンパイル時間 2,178 ms
コンパイル使用メモリ 195,908 KB
最終ジャッジ日時 2025-01-24 06:14:59
ジャッジサーバーID
(参考情報)
judge4 / judge1
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ファイルパターン 結果
sample AC * 3
other AC * 41
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 #
プレゼンテーションモードにする

#line 1 "main.cpp"
#pragma region Macros
#include <bits/stdc++.h>
using namespace std;
template <class T> inline bool chmax(T &a, T b) {
if(a < b) {
a = b;
return 1;
}
return 0;
}
template <class T> inline bool chmin(T &a, T b) {
if(a > b) {
a = b;
return 1;
}
return 0;
}
#ifdef DEBUG
template <class T, class U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
os << '(' << p.first << ',' << p.second << ')';
return os;
}
template <class T> ostream &operator<<(ostream &os, const vector<T> &v) {
os << '{';
for(int i = 0; i < (int)v.size(); i++) {
if(i) { os << ','; }
os << v[i];
}
os << '}';
return os;
}
void debugg() { cerr << endl; }
template <class T, class... Args>
void debugg(const T &x, const Args &... args) {
cerr << " " << x;
debugg(args...);
}
#define debug(...) \
cerr << __LINE__ << " [" << #__VA_ARGS__ << "]: ", debugg(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
struct Setup {
Setup() {
cin.tie(0);
ios::sync_with_stdio(false);
cout << fixed << setprecision(15);
}
} __Setup;
using ll = long long;
#define ALL(v) (v).begin(), (v).end()
#define RALL(v) (v).rbegin(), (v).rend()
#define FOR(i, a, b) for(int i = (a); i < int(b); i++)
#define REP(i, n) FOR(i, 0, n)
const int INF = 1 << 30;
const ll LLINF = 1LL << 60;
constexpr int MOD = 1000000007;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
void Case(int i) { cout << "Case #" << i << ": "; }
int popcount(int x) { return __builtin_popcount(x); }
ll popcount(ll x) { return __builtin_popcountll(x); }
#pragma endregion Macros
#line 1 "/home/siro53/kyo-pro/compro_library/math/osa_k.hpp"
// https://qiita.com/rsk0315_h4x/items/ff3b542a4468679fb409
class osa_k {
private:
int N;
vector<int> min_factor;
public:
osa_k(int N) : N(N), min_factor(N) {
iota(ALL(min_factor), 0);
for(int i = 2; i * i < N; i++) {
if(min_factor[i] < i) continue;
for(int j = i * i; j < N; j += i) {
if(min_factor[j] == j) min_factor[j] = i;
}
}
}
vector<int> factor(int n) {
vector<int> res;
while(n > 1) {
res.push_back(min_factor[n]);
n /= min_factor[n];
}
return res;
}
};
#line 72 "main.cpp"
osa_k f(1000000 + 10);
int main() {
int N;
cin >> N;
int g = 0;
REP(i, N) {
int a;
cin >> a;
auto v = f.factor(a);
g ^= (int)v.size();
}
cout << (g != 0 ? "white" : "black") << endl;
}
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