結果
問題 | No.1079 まお |
ユーザー | heno239 |
提出日時 | 2020-06-12 21:40:20 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 398 ms / 2,000 ms |
コード長 | 4,319 bytes |
コンパイル時間 | 1,764 ms |
コンパイル使用メモリ | 133,512 KB |
実行使用メモリ | 31,164 KB |
最終ジャッジ日時 | 2024-06-24 04:38:02 |
合計ジャッジ時間 | 9,429 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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 | 7 ms
20,040 KB |
testcase_01 | AC | 7 ms
19,784 KB |
testcase_02 | AC | 7 ms
19,776 KB |
testcase_03 | AC | 7 ms
19,908 KB |
testcase_04 | AC | 7 ms
19,908 KB |
testcase_05 | AC | 8 ms
19,784 KB |
testcase_06 | AC | 8 ms
19,908 KB |
testcase_07 | AC | 11 ms
19,776 KB |
testcase_08 | AC | 11 ms
19,912 KB |
testcase_09 | AC | 11 ms
19,908 KB |
testcase_10 | AC | 11 ms
19,904 KB |
testcase_11 | AC | 11 ms
20,036 KB |
testcase_12 | AC | 177 ms
25,356 KB |
testcase_13 | AC | 204 ms
26,292 KB |
testcase_14 | AC | 261 ms
27,756 KB |
testcase_15 | AC | 282 ms
28,816 KB |
testcase_16 | AC | 326 ms
29,744 KB |
testcase_17 | AC | 370 ms
28,820 KB |
testcase_18 | AC | 339 ms
28,828 KB |
testcase_19 | AC | 385 ms
28,816 KB |
testcase_20 | AC | 372 ms
28,960 KB |
testcase_21 | AC | 360 ms
28,968 KB |
testcase_22 | AC | 383 ms
31,036 KB |
testcase_23 | AC | 367 ms
31,032 KB |
testcase_24 | AC | 384 ms
31,164 KB |
testcase_25 | AC | 398 ms
31,036 KB |
testcase_26 | AC | 388 ms
31,164 KB |
testcase_27 | AC | 93 ms
21,488 KB |
testcase_28 | AC | 231 ms
26,516 KB |
testcase_29 | AC | 296 ms
31,160 KB |
testcase_30 | AC | 295 ms
31,036 KB |
testcase_31 | AC | 103 ms
21,112 KB |
ソースコード
#include<iostream> #include<string> #include<cstdio> #include<vector> #include<cmath> #include<algorithm> #include<functional> #include<iomanip> #include<queue> #include<ciso646> #include<random> #include<map> #include<set> #include<bitset> #include<stack> #include<unordered_map> #include<utility> #include<cassert> #include<complex> #include<numeric> using namespace std; //#define int long long typedef long long ll; typedef unsigned long long ul; typedef unsigned int ui; constexpr ll mod = 1000000007; const ll INF = mod * mod; typedef pair<int, int>P; #define stop char nyaa;cin>>nyaa; #define rep(i,n) for(int i=0;i<n;i++) #define per(i,n) for(int i=n-1;i>=0;i--) #define Rep(i,sta,n) for(int i=sta;i<n;i++) #define rep1(i,n) for(int i=1;i<=n;i++) #define per1(i,n) for(int i=n;i>=1;i--) #define Rep1(i,sta,n) for(int i=sta;i<=n;i++) #define all(v) (v).begin(),(v).end() typedef pair<ll, ll> LP; typedef long double ld; typedef pair<ld, ld> LDP; const ld eps = 1e-12; const ld pi = acos(-1.0); struct modint { ll n; modint() :n(0) { ; } modint(ll m) :n(m) { if (n >= mod)n %= mod; else if (n < 0)n = (n%mod + mod) % mod; } operator int() { return n; } }; bool operator==(modint a, modint b) { return a.n == b.n; } modint operator+=(modint &a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; } modint operator-=(modint &a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; } modint operator*=(modint &a, modint b) { a.n = ((ll)a.n*b.n) % mod; return a; } modint operator+(modint a, modint b) { return a += b; } modint operator-(modint a, modint b) { return a -= b; } modint operator*(modint a, modint b) { return a *= b; } modint operator^(modint a, int n) { if (n == 0)return modint(1); modint res = (a*a) ^ (n / 2); if (n % 2)res = res * a; return res; } ll inv(ll a, ll p) { return (a == 1 ? 1 : (1 - p * inv(p%a, a)) / a + p); } modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); } const int max_n = 1 << 20; modint fact[max_n], factinv[max_n]; void init_f() { fact[0] = modint(1); for (int i = 0; i < max_n - 1; i++) { fact[i + 1] = fact[i] * modint(i + 1); } factinv[max_n - 1] = modint(1) / fact[max_n - 1]; for (int i = max_n - 2; i >= 0; i--) { factinv[i] = factinv[i + 1] * modint(i + 1); } } modint comb(int a, int b) { if (a < 0 || b < 0 || a < b)return 0; return fact[a] * factinv[b] * factinv[a - b]; } void solve() { int n, k; cin >> n >> k; vector<int> a(n); rep(i, n) { cin >> a[i]; } ll ans = 0; function<void(int, int)> calc = [&](int l, int r) { if (l+1 == r) { if (a[l] + a[l] == k)ans++; return; } int m = (l + r) / 2; //[l,m),[m,r] calc(l, m); calc(m, r); int mi = mod; int num = 0; vector<int> vs; for (int i = m; i < r; i++)vs.push_back(a[i]); sort(all(vs)); vs.erase(unique(all(vs)), vs.end()); vector<vector<P>> c1(vs.size()),c2(vs.size()); for (int i = m; i < r; i++) { if (a[i] < mi) { mi = a[i]; num = 1; } else if (a[i] == mi) { num++; } int id = lower_bound(all(vs), a[i]) - vs.begin(); c2[id].push_back({ mi,i-m+1 }); if (num == 1)c1[id].push_back({ mi,i-m+1 }); } vector<vector<ll>> sum1(vs.size()), sum2(vs.size()); rep(i, vs.size()) { sort(all(c1[i])); sort(all(c2[i])); sum1[i].resize(c1[i].size() + 1); sum2[i].resize(c2[i].size() + 1); rep(j, c1[i].size()) { sum1[i][j + 1] = sum1[i][j] + c1[i][j].second; } rep(j, c2[i].size()) { sum2[i][j + 1] = sum2[i][j] + c2[i][j].second; } } mi = mod, num = 0; for (int i = m - 1; i >= l; i--) { if (a[i] < mi) { mi = a[i]; num = 1; } else if (a[i] == mi) { num++; } int to = k - a[i]; int id = lower_bound(all(vs), to) - vs.begin(); if (id == vs.size() || vs[id] != to)continue; int loc = lower_bound(all(c1[id]), P{ mi,-1 }) - c1[id].begin(); ans += (ll)loc*(m - i) + sum1[id][loc]; if (num == 1) { int loc = lower_bound(all(c2[id]), P{ mi + 1,-1 }) - c2[id].begin(); int len = c2[id].size(); ans += (ll)(len - loc)*(m - i) + sum2[id][len] - sum2[id][loc]; } } }; calc(0, n); cout << ans << "\n"; } signed main() { ios::sync_with_stdio(false); cin.tie(0); //cout << fixed << setprecision(10); //init_f(); //init(); //int t; cin >> t;rep(i,t) solve(); stop return 0; }