#821608 (C++17) No.2142 Segment Zero

• 問題: No.2142 Segment Zero
• ユーザー: noya2
• 提出日時: 2022-12-02 21:46:24
• 言語: C++17 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 13 ms / 2,000 ms
• コード長: 4,116 bytes
• コンパイル時間: 4,351 ms
• コンパイル使用メモリ: 269,644 KB
• 実行使用メモリ: 5,248 KB
• 最終ジャッジ日時: 2024-10-09 22:55:25
• 合計ジャッジ時間: 5,856 ms
• ジャッジサーバーID （参考情報）: judge5 / judge1

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 5,248 KB
testcase_01	AC	12 ms; 5,248 KB
testcase_02	AC	1 ms; 5,248 KB
testcase_03	AC	2 ms; 5,248 KB
testcase_04	AC	3 ms; 5,248 KB
testcase_05	AC	3 ms; 5,248 KB
testcase_06	AC	2 ms; 5,248 KB
testcase_07	AC	5 ms; 5,248 KB
testcase_08	AC	12 ms; 5,248 KB
testcase_09	AC	8 ms; 5,248 KB
testcase_10	AC	12 ms; 5,248 KB
testcase_11	AC	12 ms; 5,248 KB
testcase_12	AC	12 ms; 5,248 KB
testcase_13	AC	13 ms; 5,248 KB
testcase_14	AC	12 ms; 5,248 KB
testcase_15	AC	13 ms; 5,248 KB
testcase_16	AC	12 ms; 5,248 KB
testcase_17	AC	11 ms; 5,248 KB
testcase_18	AC	3 ms; 5,248 KB
testcase_19	AC	3 ms; 5,248 KB
testcase_20	AC	7 ms; 5,248 KB
testcase_21	AC	6 ms; 5,248 KB
testcase_22	AC	10 ms; 5,248 KB
testcase_23	AC	4 ms; 5,248 KB
testcase_24	AC	6 ms; 5,248 KB
testcase_25	AC	4 ms; 5,248 KB
testcase_26	AC	8 ms; 5,248 KB
testcase_27	AC	4 ms; 5,248 KB
testcase_28	AC	7 ms; 5,248 KB
testcase_29	AC	7 ms; 5,248 KB
testcase_30	AC	9 ms; 5,248 KB
testcase_31	AC	2 ms; 5,248 KB
testcase_32	AC	4 ms; 5,248 KB
testcase_33	AC	3 ms; 5,248 KB
testcase_34	AC	4 ms; 5,248 KB
testcase_35	AC	11 ms; 5,248 KB
testcase_36	AC	4 ms; 5,248 KB

ソースコード

#line 1 "c.cpp"
#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for (int i = 0; i < int(n); ++i)
#define repp(i,n,m) for (int i = m; i < int(n); ++i)
#define reb(i,n) for (int i = int(n)-1; i >= 0; --i)
#define all(v) v.begin(),v.end()
using namespace std;
using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<int, int>;
using PL = pair<long long, long long>;
using pdd = pair<long double, long double>;
using pil = pair<int,ll>;
using pli = pair<ll,int>;
template<class T>istream &operator>>(istream &is,vector<T> &v){for(auto &e:v)is>>e;return is;}
template<typename T>bool range(T a,T b,T x){return (a<=x&&x<b);}
template<typename T>bool rrange(T a,T b,T c,T d,T x,T y){return (range(a,c,x)&&range(b,d,y));}
template<typename T>void rev(vector<T> &v){reverse(v.begin(),v.end());}
void revs(string &s) {reverse(s.begin(),s.end());}
template<typename T>void sor(vector<T> &v, int f=0){sort(v.begin(),v.end());if(f!=0) rev(v);}
template<typename T>bool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;}
template<typename T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<typename T>void uniq(vector<T> &v){sor(v);v.erase(unique(v.begin(),v.end()),v.end());}
template<typename T1, typename T2>void print(pair<T1,T2> a);
template<typename T>void print(vector<T> v);
template<typename T>void print(vector<vector<T>> v);
void print(){ putchar(' '); }
void print(bool a){ printf("%d", a); }
void print(int a){ printf("%d", a); }
void print(long a){ printf("%ld", a); }
void print(long long a){ printf("%lld", a); }
void print(char a){ printf("%c", a); }
void print(char a[]){ printf("%s", a); }
void print(const char a[]){ printf("%s", a); }
void print(long double a){ printf("%.15Lf", a); }
void print(const string& a){ for(auto&& i : a) print(i); }
void print(unsigned int a){ printf("%u", a); }
void print(unsigned long long a) { printf("%llu", a); }
template<class T> void print(const T& a){ cout << a; }
int out(){ putchar('\n'); return 0; }
template<class T> int out(const T& t){ print(t); putchar('\n'); return 0; }
template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); putchar(' '); out(tail...); return 0; }
template<typename T1,typename T2>void print(pair<T1,T2> a){print(a.first);print(),print(a.second);}
template<typename T>void print(vector<T> v){for(auto ite=v.begin();ite!=v.end();){print(*ite);if(++ite!=v.end())print();}}
template<typename T>void print(vector<vector<T>> v){for(auto ite=v.begin();ite!=v.end();){print(*ite);if(++ite!=v.end())out();}}
void yes(){out("Yes");}
void no (){out("No");}
void yn (bool t){if(t)yes();else no();}
void fast_io(){cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20);}
void o(){out("!?");}

namespace noya2{

const int INF = 1001001007;
const long long mod1 = 998244353;
const long long mod2 = 1000000007;
const long long inf = 2e18;
const long double pi = 3.14159265358979323;
const long double eps = 1e-7;
const vector<int> dx = {0,1,0,-1,1,1,-1,-1};
const vector<int> dy = {1,0,-1,0,1,-1,-1,1};
const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string alp = "abcdefghijklmnopqrstuvwxyz";
const string NUM = "0123456789";

} // namespace noya2
using namespace noya2;

using mint = modint998244353;
void out(mint a){out(a.val());}
void out(vector<mint> a){vector<ll> b(a.size()); rep(i,a.size()) b[i] = a[i].val(); out(b);}
void out(vector<vector<mint>> a){for (auto v : a) out(v);}
istream &operator>>(istream &is,vector<mint> &v){for(auto &e:v){ll _x;is>>_x;e=_x;}return is;}


void solve(){
    ll n, k; cin >> n >> k;
    k = n * (n + 1) / 2 - k;
    ll m = 2 * k;
    int ans = 2;
    for (ll d = 1; d * d <= m; d++){
        if (m % d != 0) continue;
        ll a = d, b = m / d;
        if ((a + b - 1) % 2 != 0) continue;
        if ((b - a + 1) % 2 != 0) continue;
        ll r = (a + b - 1) / 2, l = (b - a + 1) / 2;
        if (1 <= l && l <= r && r <= n) ans = 1;
    }
    out(ans);
}

int main(){
    fast_io();
    int t = 1; //cin >> t;
    while(t--) solve();
}