結果
問題 | No.2142 Segment Zero |
ユーザー |
|
提出日時 | 2022-12-02 23:11:23 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 782 ms / 2,000 ms |
コード長 | 2,673 bytes |
コンパイル時間 | 4,429 ms |
コンパイル使用メモリ | 258,132 KB |
最終ジャッジ日時 | 2025-02-09 04:22:15 |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 35 |
ソースコード
#include <bits/stdc++.h>using namespace std;#include <atcoder/all>using namespace atcoder;using ll = long long;using vll = vector<ll>;using vvll = vector<vll>;using vvvll = vector<vvll>;using vvvvll = vector<vvvll>;using vvvvvll = vector<vvvvll>;using vvvvvvll = vector<vvvvvll>;using vb = vector<bool>;using vvb = vector<vb>;using vvvb = vector<vvb>;using vvvvb = vector<vvvb>;using vd = vector<double>;using vvd = vector<vd>;using vvvd = vector<vvd>;using vvvvd = vector<vvvd>;using vvvvvd = vector<vvvvd>;#define all(A) A.begin(),A.end()#define ALL(A) A.begin(),A.end()#define rep(i, n) for (ll i = 0; i < (ll) (n); i++)using pqr = priority_queue<pair<ll, ll>, vector<pair<ll, ll>>, greater<pair<ll, ll>>>;template<class T>bool chmax(T& p, T q, bool C = 1) {if (C == 0 && p == q) {return 1;}if (p < q) {p = q;return 1;}else {return 0;}}template<class T>bool chmin(T& p, T q, bool C = 1) {if (C == 0 && p == q) {return 1;}if (p > q) {p = q;return 1;}else {return 0;}}ll gcd(ll(a), ll(b)) {if (a == 0)return b;if (b == 0)return a;ll c = a;while (a % b != 0) {c = a % b;a = b;b = c;}return b;}ll sqrtz(ll N) {ll L = 0;ll R = sqrt(N) + 10000;while (abs(R - L) > 1) {ll mid = (R + L) / 2;if (mid * mid <= N)L = mid;else R = mid;}return L;}using mint = modint998244353;//using Mint = modint;vector<mint> fact, factinv, inv;const ll mod = 998244353;void prenCkModp(ll n) {fact.resize(n + 5);factinv.resize(n + 5);inv.resize(n + 5);fact[0] = fact[1] = 1;factinv[0] = factinv[1] = 1;inv[1] = 1;for (ll i = 2; i < n + 5; i++) {fact[i] = (fact[i - 1] * i);inv[i] = mod - (inv[mod % i] * (mod / i));factinv[i] = (factinv[i - 1] * inv[i]);}}mint nCk(ll n, ll k) {if (n < k || k < 0) return 0;return fact[n] * (factinv[k] * factinv[n - k]);}int main() {ll N,K;cin>>N>>K;ll S=N*(N+1)/2;rep(i,N+1){ll d=(i)*(i+1)/2;if(K==d||S-d==K){cout<<1<<endl;return 0;}if(S-K==i){cout<<1<<endl;return 0;}}vll A(N+1,0);set<ll> SS;rep(i,N){A[i+1]=A[i]+(i+1);SS.insert(A[i]);SS.insert(A[i+1]);}rep(i,N+1){ll d=A[i];if(SS.count(d+(S-K))){cout<<1<<endl;return 0;}}cout<<2<<endl;return 0;}