結果

問題 No.2512 Mountain Sequences
ユーザー 👑 amentorimaruamentorimaru
提出日時 2023-08-01 14:46:45
言語 C++17(clang)
(17.0.6 + boost 1.83.0)
結果
AC  
実行時間 879 ms / 3,000 ms
コード長 4,432 bytes
コンパイル時間 4,418 ms
コンパイル使用メモリ 124,844 KB
実行使用メモリ 18,836 KB
最終ジャッジ日時 2023-09-07 00:21:17
合計ジャッジ時間 22,000 ms
ジャッジサーバーID
(参考情報)
judge13 / judge15
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 71 ms
6,356 KB
testcase_01 AC 71 ms
6,328 KB
testcase_02 AC 71 ms
6,332 KB
testcase_03 AC 70 ms
6,336 KB
testcase_04 AC 71 ms
6,328 KB
testcase_05 AC 70 ms
6,284 KB
testcase_06 AC 71 ms
6,328 KB
testcase_07 AC 71 ms
6,336 KB
testcase_08 AC 70 ms
6,332 KB
testcase_09 AC 71 ms
6,276 KB
testcase_10 AC 878 ms
11,756 KB
testcase_11 AC 876 ms
11,804 KB
testcase_12 AC 876 ms
11,836 KB
testcase_13 AC 876 ms
11,808 KB
testcase_14 AC 879 ms
11,776 KB
testcase_15 AC 874 ms
11,820 KB
testcase_16 AC 877 ms
11,752 KB
testcase_17 AC 874 ms
11,736 KB
testcase_18 AC 874 ms
11,760 KB
testcase_19 AC 872 ms
11,756 KB
testcase_20 AC 530 ms
12,448 KB
testcase_21 AC 531 ms
12,524 KB
testcase_22 AC 536 ms
12,392 KB
testcase_23 AC 532 ms
12,336 KB
testcase_24 AC 530 ms
12,396 KB
testcase_25 AC 723 ms
18,256 KB
testcase_26 AC 336 ms
18,836 KB
testcase_27 AC 749 ms
18,784 KB
testcase_28 AC 374 ms
18,224 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 #

#define ATCODER
#define _USE_MATH_DEFINES
#include<stdio.h>
#include<iostream>
#include<fstream>
#include<algorithm>
#include<vector>
#include<string>
#include <cassert>
#include <numeric>
#include <unordered_map>
#include <unordered_set>
#include <queue>
#include <math.h>
#include <climits>
#include <set>
#include <map>
#include <list>
#include <random>
#include <iterator>
#include <bitset>
#include <chrono>

using namespace std;

using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;

//template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;

#define FOR(i, a, b) for(ll i=(a); i<(b);i++)
#define REP(i, n) for(ll i=0; i<(n);i++)
#define ROF(i, a, b) for(ll i=(b-1); i>=(a);i--)
#define PER(i, n) for(ll i=n-1; i>=0;i--)
#define REPREP(i,j,a,b) for(ll i=0;i<a;i++)for(ll j=0;j<b;j++)
#define VV(type) vector< vector<type> >
#define VV2(type,n,m,val) vector< vector<type> > val;val.resize(n);for(ll i;i<n;i++)val[i].resize(m)
#define vec(type) vector<type>
#define VEC(type,n,val) vector<type> val;val.resize(n)
#define VL vector<ll>
#define VVL vector< vector<ll> >
#define VP vector< pair<ll,ll> >
#define SZ size()
#define all(i) begin(i),end(i)
#define SORT(i) sort(all(i))
#define BITI(i) (1<<i)
#define BITSET(x,i) x | (ll(1)<<i)
#define BITCUT(x,i) x & ~(ll(1)<<i)
#define EXISTBIT(x,i) (((x>>i) & 1) != 0)
#define ALLBIT(n) (ll(1)<<n-1)
#define CHMAX(n,v) n=n<v?v:n
#define CHMIN(n,v) n=n>v?v:n
#define MP(a,b) make_pair(a,b)
#define DET2(x1,y1,x2,y2) x1*y2-x2*y1
#define DET3(x1,y1,z1,x2,y2,z2,x3,y3,z3) x1*y2*z3+x2*y3*z1+x3*y1*z2-z1*y2*x3-z2*y3*x1-z3*y1*x2
#define INC(a) for(auto& v:a)v++;
#define DEC(a) for(auto& v:a)v--;
#define SQU(x) (x)*(x)
#define L0 ll(0)
#ifdef ATCODER
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using mint2 = modint998244353;
#endif
template<typename T = ll>
vector<T> read(size_t n) {
  vector<T> ts(n);
  for (size_t i = 0; i < n; i++) cin >> ts[i];
  return ts;
}

template<typename TV, const ll N> void read_tuple_impl(TV&) {}
template<typename TV, const ll N, typename Head, typename... Tail>
void read_tuple_impl(TV& ts) {
  get<N>(ts).emplace_back(*(istream_iterator<Head>(cin)));
  read_tuple_impl<TV, N + 1, Tail...>(ts);
}
template<typename... Ts> decltype(auto) read_tuple(size_t n) {
  tuple<vector<Ts>...> ts;
  for (size_t i = 0; i < n; i++) read_tuple_impl<decltype(ts), 0, Ts...>(ts);
  return ts;
}

using val = ll;
using func = ll;

val op(val a, val b) { return min(a, b); }
val e() { return 1e18; }


val mp(func f, val a) {
  if (f == -1)
    return a;
  return f;
}
func comp(func f, func g) {
  if (f == -1)
    return g;
  return f;
}
func id() { return -1; }

ll di[4] = { 1,0,-1,0 };
ll dj[4] = { 0,1,0,-1 };
//ll di[4] = { -1,-1,1,1 };
//ll dj[4] = { -1,1,-1,1 };
ll di8[8] = { 0,-1,-1,-1,0,1,1,1 };
ll dj8[8] = { -1,-1,0,1,1,1,0,-1 };

template<typename T>
T Combi(ll a, ll b, vector<T>& fact, vector<T>& rfact) {
  if (a < 0 || b < 0 || a < b)
    return 0;
  return fact[a] * rfact[b] * rfact[a - b];
}

void solve() {
  ll t;
  cin >> t;
  ll MAX_N = 200000;
  ll MAX_M = 200000;
  ll rn = sqrt(MAX_N);
  vector<mint2> f(MAX_N * 2 + 101, 1), rf(MAX_N * 2 + 101, 1);
  mint2 half = mint2(1) / 2;
  REP(i, MAX_N * 2 + 100) {
    f[i + 1] = f[i] * (i + 1);
    rf[i + 1] = mint2(1) / f[i + 1];
  }

  vector<tuple<ll, ll, ll>> nmi(t);
  REP(i, t) {
    ll n, m;
    cin >> n >> m;
    nmi[i] = make_tuple(n, m, i);
  }
  SORT(nmi);
  vector<mint2> ans(t);
  ll mx = 0;
  ll nnm = 0;
  while (mx < MAX_N) {
    vector<tuple<ll, ll, ll>> mni;
    while (nnm < t) {
      auto [n, m, i] = nmi[nnm];
      if (n >= mx + rn + 1)
        break;
      if (m * 2 > n)
        mni.emplace_back(m, n, i);
      nnm++;
    }
    SORT(mni);
    mint2 sum = 0;
    ll fsm = (mx + 1) / 2;
    ll mnid = 0;
    FOR(mm, fsm, MAX_M + 1) {
      if (mnid == mni.size())
        break;
      while (mnid < mni.size()) {
        auto [m, n, i] = mni[mnid];
        if (m != mm)
          break;
        mint2 now = sum;
        REP(i, n - mx - 1) {
          now = (Combi(m * 2, mx + i + 2, f, rf) - now) * half;
        }
        ans[i] = now;
        mnid++;
      }
      sum += Combi(mm * 2, mx, f, rf);
    }
    mx += rn;
  }
  REP(i, t) {
    cout << ans[i].val() << "\n";
  }


  return;
}
int main() {
  ll t = 1;
  //cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}

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