#822034 (C++23) No.2142 Segment Zero

• 問題: No.2142 Segment Zero
• ユーザー: ゾビオ
• 提出日時: 2022-12-03 00:14:52
• 言語: C++23 (gcc 13.3.0 + boost 1.87.0)
• 結果: AC
• 実行時間: 14 ms / 2,000 ms
• コード長: 2,247 bytes
• コンパイル時間: 4,940 ms
• コンパイル使用メモリ: 308,388 KB
• 実行使用メモリ: 19,020 KB
• 最終ジャッジ日時: 2024-10-10 02:39:36
• 合計ジャッジ時間: 6,545 ms
• ジャッジサーバーID （参考情報）: judge5 / judge2

ファイルパターン	結果
sample	AC * 2
other	AC * 35

ソースコード

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#include <bits/stdc++.h>
#include <atcoder/all> // AtCoder
using namespace std;
using namespace atcoder; // AtCoder
using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using mint = modint998244353; // AtCoder
using vll = vector<long long>;
using vvll = vector<vector<long long>>;
using vvvll = vector<vector<vector<long long>>>;
using vvvvll = vector<vector<vector<vector<long long>>>>;
using dll = deque<long long>;
using ddll = deque<deque<long long>>;
using dddll = deque<deque<deque<long long>>>;
using ddddll = deque<deque<deque<deque<long long>>>>;
using pll = pair<long long, long long>;
using vpll = vector<pair<long long, long long>>;
using vvpll = vector<vector<pair<long long, long long>>>;
#define rep(i, n) for (long long i = 0; i < n; i++)
#define reps(i, n) for (long long i = 1; i <= n; i++)
#define rrep(i, n) for (long long i = n - 1; i >= 0; i--)
#define rreps(i, n) for (long long i = n; i >= 1; i--)
#define reep(i, a, b) for (long long i = a; i < b; i++)
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()
#define PI acos(-1.0)
#define YES printf("Yes\n"), exit(0)
#define NO printf("No\n"), exit(0)
constexpr long long MOD = 998244353LL;
constexpr long long INF = (1LL << 60);
template<class T> void setcout(T n) {cout << setprecision(n) << fixed;}
template<class T> void arrcout(T &a) { for(size_t i = 0; i < a.size(); i++) cout << (i ? " " : "") << a.at(i); cout << endl; }
template<class T> void arrcout2(T &a) { for(size_t i = 0; i < a.size(); i++) { for(size_t j = 0; j < a[i].size(); j++) cout << (j ? " " : "") << a.at
    (i).at(j); cout << endl;} }
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
//#pragma GCC target("avx2")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
int main() {
    ll n, k; cin >> n >> k;
    vll a(n); iota(all(a), 1ll);
    vll rui(n + 1); rep(i, n) rui[i + 1] = rui[i] + a[i];
    ll ans = 2;
    ll r = 0;
    rep(l, n) { //尺取り法
        while(r < n && rui.back() - rui[r] + rui[l] > k) r++;
        if(rui.back() - rui[r] + rui[l] == k) ans = 1;
    }
    cout << ans << endl;
}
 
 
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