結果
問題 | No.1300 Sum of Inversions |
ユーザー | first_vil |
提出日時 | 2020-11-27 21:41:14 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 500 ms / 2,000 ms |
コード長 | 6,883 bytes |
コンパイル時間 | 2,327 ms |
コンパイル使用メモリ | 221,132 KB |
実行使用メモリ | 28,920 KB |
最終ジャッジ日時 | 2024-07-26 12:02:54 |
合計ジャッジ時間 | 14,160 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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 | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 355 ms
25,784 KB |
testcase_04 | AC | 338 ms
25,448 KB |
testcase_05 | AC | 272 ms
17,664 KB |
testcase_06 | AC | 409 ms
26,900 KB |
testcase_07 | AC | 384 ms
26,428 KB |
testcase_08 | AC | 441 ms
27,644 KB |
testcase_09 | AC | 441 ms
27,564 KB |
testcase_10 | AC | 210 ms
16,256 KB |
testcase_11 | AC | 210 ms
16,256 KB |
testcase_12 | AC | 339 ms
25,536 KB |
testcase_13 | AC | 327 ms
25,196 KB |
testcase_14 | AC | 500 ms
28,620 KB |
testcase_15 | AC | 447 ms
27,480 KB |
testcase_16 | AC | 370 ms
25,996 KB |
testcase_17 | AC | 202 ms
16,000 KB |
testcase_18 | AC | 232 ms
17,024 KB |
testcase_19 | AC | 298 ms
24,400 KB |
testcase_20 | AC | 311 ms
24,724 KB |
testcase_21 | AC | 297 ms
24,648 KB |
testcase_22 | AC | 264 ms
17,664 KB |
testcase_23 | AC | 403 ms
26,900 KB |
testcase_24 | AC | 269 ms
17,920 KB |
testcase_25 | AC | 233 ms
16,768 KB |
testcase_26 | AC | 229 ms
16,640 KB |
testcase_27 | AC | 251 ms
17,408 KB |
testcase_28 | AC | 449 ms
27,872 KB |
testcase_29 | AC | 294 ms
24,512 KB |
testcase_30 | AC | 432 ms
27,556 KB |
testcase_31 | AC | 270 ms
17,792 KB |
testcase_32 | AC | 295 ms
18,048 KB |
testcase_33 | AC | 18 ms
6,944 KB |
testcase_34 | AC | 33 ms
6,940 KB |
testcase_35 | AC | 272 ms
28,784 KB |
testcase_36 | AC | 277 ms
28,920 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; using VI = vector<int>; using VL = vector<ll>; using VS = vector<string>; template<class T> using PQ = priority_queue<T, vector<T>, greater<T>>; #define FOR(i,a,n) for(int i=(a);i<(n);++i) #define eFOR(i,a,n) for(int i=(a);i<=(n);++i) #define rFOR(i,a,n) for(int i=(n)-1;i>=(a);--i) #define erFOR(i,a,n) for(int i=(n);i>=(a);--i) #define SORT(a) sort(a.begin(),a.end()) #define rSORT(a) sort(a.rbegin(),a.rend()) #define fSORT(a,f) sort(a.begin(),a.end(),f) #define all(a) a.begin(),a.end() #define out(y,x) ((y)<0||h<=(y)||(x)<0||w<=(x)) #define tp(a,i) get<i>(a) #ifdef _DEBUG #define line cout << "-----------------------------\n" #define stop system("pause") #endif constexpr ll INF = 1000000000; constexpr ll LLINF = 1LL << 60; constexpr ll mod = 1000000007; constexpr ll MOD = 998244353; constexpr ld eps = 1e-10; constexpr ld pi = 3.1415926535897932; template<class T>inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; }return false; } template<class T>inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; }return false; } inline void init() { cin.tie(nullptr); cout.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } template<class T>inline istream& operator>>(istream& is, vector<T>& v) { for (auto& a : v)is >> a; return is; } template<class T, class U>inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; } template<class T>inline vector<T> vec(size_t a) { return vector<T>(a); } template<class T>inline vector<T> defvec(T def, size_t a) { return vector<T>(a, def); } template<class T, class... Ts>inline auto vec(size_t a, Ts... ts) { return vector<decltype(vec<T>(ts...))>(a, vec<T>(ts...)); } template<class T, class... Ts>inline auto defvec(T def, size_t a, Ts... ts) { return vector<decltype(defvec<T>(def, ts...))>(a, defvec<T>(def, ts...)); } template<class T>inline void print(const T& a) { cout << a << "\n"; } template<class T, class... Ts>inline void print(const T& a, const Ts&... ts) { cout << a << " "; print(ts...); } template<class T>inline void print(const vector<T>& v) { for (int i = 0; i < v.size(); ++i)cout << v[i] << (i == v.size() - 1 ? "\n" : " "); } template<class T>inline void print(const vector<vector<T>>& v) { for (auto& a : v)print(a); } inline string reversed(const string& s) { string t = s; reverse(all(t)); return t; } template<class T>inline T sum(const vector<T>& a, int l, int r) { return a[r] - (l == 0 ? 0 : a[l - 1]); } template<class T>inline void END(T s) { print(s); exit(0); } void END() { exit(0); } template<int modulo> struct ModInt { int x; ModInt() : x(0) {} ModInt(ll y) : x(y >= 0 ? y % modulo : (modulo - (-y) % modulo) % modulo) {} ModInt& operator+=(const ModInt& p) { if ((x += p.x) >= modulo) x -= modulo; return *this; } ModInt& operator-=(const ModInt& p) { if ((x += modulo - p.x) >= modulo) x -= modulo; return *this; } ModInt& operator*=(const ModInt& p) { x = (int)(1LL * x * p.x % modulo); return *this; } ModInt& operator/=(const ModInt& p) { *this *= p.inverse(); return *this; } ModInt operator-() const { return ModInt(-x); } ModInt operator+(const ModInt& p) const { return ModInt(*this) += p; } ModInt operator-(const ModInt& p) const { return ModInt(*this) -= p; } ModInt operator*(const ModInt& p) const { return ModInt(*this) *= p; } ModInt operator/(const ModInt& p) const { return ModInt(*this) /= p; } bool operator==(const ModInt& p) const { return x == p.x; } bool operator!=(const ModInt& p) const { return x != p.x; } ModInt inverse() const { int a = x, b = modulo, u = 1, v = 0, t; while (b > 0) { t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } return ModInt(u); } ModInt pow(ll e) { ll a = 1, p = x; while (e > 0) { if (e % 2 == 0) { p = (p * p) % modulo; e /= 2; } else { a = (a * p) % modulo; e--; } } return ModInt(a); } friend ostream& operator<<(ostream& os, const ModInt<modulo>& p) { return os << p.x; } friend istream& operator>>(istream& is, ModInt<modulo>& a) { ll x; is >> x; a = ModInt<modulo>(x); return (is); } }; using modint = ModInt<MOD>; template<class Op> class SegmentTree { using T = typename Op::T; int len, n; vector<T> dat; public: SegmentTree(const int _n) : n(_n) { for (len = 1; len < n; len <<= 1); dat.resize(len << 1, Op::unit); } SegmentTree(const vector<T>& v) : n(v.size()) { for (len = 1; len < n; len <<= 1); dat.resize(len << 1, Op::unit); for (int i = 0; i < n; ++i)dat[i + len] = v[i]; for (int i = len - 1; 0 < i; --i) dat[i] = Op::merge(dat[i << 1], dat[i << 1 | 1]); } inline void update(int idx, const T a) { idx += len; dat[idx] = Op::update(dat[idx], a); for (idx >>= 1; 0 < idx; idx >>= 1) dat[idx] = Op::merge(dat[idx << 1], dat[idx << 1 | 1]); } inline T value(int l, int r) { T vl = Op::unit, vr = Op::unit; for (l += len, r += len; l < r; l >>= 1, r >>= 1) { if (l & 1)vl = Op::merge(vl, dat[l++]); if (r & 1)vr = Op::merge(dat[--r], vr); } return Op::merge(vl, vr); } inline T operator[](int idx) { return dat[idx + len]; } }; template<class Type> struct node { using T = Type; inline static T unit = 0; inline static T merge(T vl, T vr) { return vl + vr; } inline static T update(T vl, T vr) { return vl + vr; } }; int main() { init(); int n; cin >> n; map<int, int> m; VI a(n); FOR(i, 0, n) { cin >> a[i]; m[a[i]]; } int k = m.size(); VI za(k); { int i = 0; for (auto it = m.begin(); it != m.end(); ++it) { it->second = i; za[i++] = it->first; } } VL s(k); VI t(k); FOR(i, 0, n) { s[m[a[i]]] += a[i]; ++t[m[a[i]]]; } SegmentTree<node<ll>> l(k), r(s); SegmentTree<node<int>> l_cnt(k), r_cnt(t); modint ans = 0; FOR(i, 0, n) { int p = m[a[i]]; r.update(p, -a[i]); r_cnt.update(p, -1); ans += l.value(p + 1, k) % MOD * r_cnt.value(0, p); ans += l_cnt.value(p + 1, k) * (r.value(0, p) % MOD); ans += a[i] % MOD * l_cnt.value(p + 1, k) % MOD * r_cnt.value(0, p); l.update(p, a[i]); l_cnt.update(p, 1); } print(ans); return 0; }