結果
問題 | No.1300 Sum of Inversions |
ユーザー | chocopuu |
提出日時 | 2020-11-27 21:50:43 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,504 bytes |
コンパイル時間 | 2,588 ms |
コンパイル使用メモリ | 220,088 KB |
実行使用メモリ | 22,960 KB |
最終ジャッジ日時 | 2024-07-26 12:17:07 |
合計ジャッジ時間 | 14,620 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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
6,940 KB |
testcase_03 | AC | 347 ms
22,260 KB |
testcase_04 | AC | 335 ms
22,168 KB |
testcase_05 | AC | 269 ms
13,504 KB |
testcase_06 | AC | 393 ms
22,504 KB |
testcase_07 | AC | 381 ms
22,480 KB |
testcase_08 | AC | 422 ms
22,592 KB |
testcase_09 | AC | 419 ms
22,516 KB |
testcase_10 | AC | 220 ms
13,128 KB |
testcase_11 | AC | 219 ms
13,276 KB |
testcase_12 | AC | 336 ms
22,188 KB |
testcase_13 | AC | 334 ms
22,136 KB |
testcase_14 | AC | 456 ms
22,888 KB |
testcase_15 | AC | 411 ms
22,652 KB |
testcase_16 | AC | 356 ms
22,140 KB |
testcase_17 | AC | 203 ms
13,048 KB |
testcase_18 | AC | 244 ms
13,428 KB |
testcase_19 | AC | 300 ms
21,940 KB |
testcase_20 | AC | 307 ms
21,940 KB |
testcase_21 | AC | 304 ms
21,812 KB |
testcase_22 | AC | 268 ms
13,512 KB |
testcase_23 | AC | 390 ms
22,396 KB |
testcase_24 | AC | 276 ms
13,536 KB |
testcase_25 | AC | 233 ms
13,352 KB |
testcase_26 | AC | 234 ms
13,228 KB |
testcase_27 | AC | 256 ms
13,400 KB |
testcase_28 | AC | 433 ms
22,624 KB |
testcase_29 | AC | 296 ms
21,836 KB |
testcase_30 | AC | 414 ms
22,740 KB |
testcase_31 | AC | 265 ms
13,448 KB |
testcase_32 | AC | 278 ms
13,548 KB |
testcase_33 | AC | 54 ms
7,144 KB |
testcase_34 | AC | 109 ms
7,140 KB |
testcase_35 | AC | 284 ms
22,960 KB |
testcase_36 | WA | - |
ソースコード
#include "bits/stdc++.h" using namespace std; //#include "atcoder/all" //using namespace atcoder; #define int long long #define REP(i, n) for (int i = 0; i < (int)n; ++i) #define RREP(i, n) for (int i = (int)n - 1; i >= 0; --i) #define FOR(i, s, n) for (int i = s; i < (int)n; ++i) #define RFOR(i, s, n) for (int i = (int)n - 1; i >= s; --i) #define ALL(a) a.begin(), a.end() #define IN(a, x, b) (a <= x && x < b) template<class T>istream&operator >>(istream&is,vector<T>&vec){for(T&x:vec)is>>x;return is;} template<class T>inline void out(T t){cout << t << "\n";} template<class T,class... Ts>inline void out(T t,Ts... ts){cout << t << " ";out(ts...);} template<class T>inline bool CHMIN(T&a,T b){if(a > b){a = b;return true;}return false;} template<class T>inline bool CHMAX(T&a,T b){if(a < b){a = b;return true;}return false;} constexpr int INF = 1e18; template<int MOD> struct Fp { long long val; constexpr Fp(long long v = 0) noexcept : val(v % MOD) { if (val < 0) val += MOD; } constexpr int getmod() { return MOD; } constexpr Fp operator - () const noexcept { return val ? MOD - val : 0; } constexpr Fp operator + (const Fp& r) const noexcept { return Fp(*this) += r; } constexpr Fp operator - (const Fp& r) const noexcept { return Fp(*this) -= r; } constexpr Fp operator * (const Fp& r) const noexcept { return Fp(*this) *= r; } constexpr Fp operator / (const Fp& r) const noexcept { return Fp(*this) /= r; } constexpr Fp& operator += (const Fp& r) noexcept { val += r.val; if (val >= MOD) val -= MOD; return *this; } constexpr Fp& operator -= (const Fp& r) noexcept { val -= r.val; if (val < 0) val += MOD; return *this; } constexpr Fp& operator *= (const Fp& r) noexcept { val = val * r.val % MOD; return *this; } constexpr Fp& operator /= (const Fp& r) noexcept { long long a = r.val, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } val = val * u % MOD; if (val < 0) val += MOD; return *this; } constexpr bool operator == (const Fp& r) const noexcept { return this->val == r.val; } constexpr bool operator != (const Fp& r) const noexcept { return this->val != r.val; } friend constexpr ostream& operator << (ostream &os, const Fp<MOD>& x) noexcept { return os << x.val; } friend constexpr Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept { if (n == 0) return 1; auto t = modpow(a, n / 2); t = t * t; if (n & 1) t = t * a; return t; } }; template<class T> struct BiCoef { vector<T> fact_, inv_, finv_; constexpr BiCoef() {} constexpr BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) { init(n); } constexpr void init(int n) noexcept { fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1); int MOD = fact_[0].getmod(); for(int i = 2; i < n; i++){ fact_[i] = fact_[i-1] * i; inv_[i] = -inv_[MOD%i] * (MOD/i); finv_[i] = finv_[i-1] * inv_[i]; } } constexpr T com(int n, int k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact_[n] * finv_[k] * finv_[n-k]; } constexpr T P(int n, int k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact_[n] * finv_[n-k]; } constexpr T fact(int n) const noexcept { if (n < 0) return 0; return fact_[n]; } constexpr T inv(int n) const noexcept { if (n < 0) return 0; return inv_[n]; } constexpr T finv(int n) const noexcept { if (n < 0) return 0; return finv_[n]; } }; // const int MOD = 1000000007; const int MOD = 998244353; using mint = Fp<MOD>; BiCoef<mint> bc; // bc.init(500050); template <typename T> struct SegmentTree{ using F = function<T(T,T)>; int n; F f; T ti; vector<T> dat; SegmentTree(){} SegmentTree(F f,T ti):f(f),ti(ti){} void init(int n_){ n=1; while(n<n_) n<<=1; dat.assign(n<<1,ti); } void build(const vector<T> &v){ int n_=v.size(); init(n_); for(int i=0;i<n_;i++) dat[n+i]=v[i]; for(int i=n-1;i;i--) dat[i]=f(dat[(i<<1)|0],dat[(i<<1)|1]); } void set_val(int k,T x){ dat[k+=n]=x; while(k>>=1) dat[k]=f(dat[(k<<1)|0],dat[(k<<1)|1]); } T query(int a,int b){ if(a>=b) return ti; T vl=ti,vr=ti; for(int l=a+n,r=b+n;l<r;l>>=1,r>>=1) { if(l&1) vl=f(vl,dat[l++]); if(r&1) vr=f(dat[--r],vr); } return f(vl,vr); } template<typename C> int find(int st,C &check,T &acc,int k,int l,int r){ if(l+1==r){ acc=f(acc,dat[k]); return check(acc)?k-n:-1; } int m=(l+r)>>1; if(m<=st) return find(st,check,acc,(k<<1)|1,m,r); if(st<=l&&!check(f(acc,dat[k]))){ acc=f(acc,dat[k]); return -1; } int vl=find(st,check,acc,(k<<1)|0,l,m); if(~vl) return vl; return find(st,check,acc,(k<<1)|1,m,r); } template<typename C> int find(int st,C &check){ T acc=ti; return find(st,check,acc,1,0,n); } //アウトの条件を渡す }; template< typename T > struct Compress { vector< T > xs; Compress() = default; Compress(const vector< T > &vs) { add(vs); } Compress(const initializer_list< vector< T > > &vs) { for(auto &p : vs) add(p); } void add(const vector< T > &vs) { copy(begin(vs), end(vs), back_inserter(xs)); } void add(const T &x) { xs.emplace_back(x); } void build() { sort(begin(xs), end(xs)); xs.erase(unique(begin(xs), end(xs)), end(xs)); } vector< int > get(const vector< T > &vs) const { vector< int > ret; transform(begin(vs), end(vs), back_inserter(ret), [&](const T &x) { return lower_bound(begin(xs), end(xs), x) - begin(xs); }); return ret; } int get(const T &x) const { return lower_bound(begin(xs), end(xs), x) - begin(xs); } const T &operator[](int k) const { return xs[k]; } }; signed main(){ int N; cin >> N; vector<int> a(N); cin >> a; Compress c(a); c.build(); SegmentTree<pair<int, int>>l([](pair<int, int> a, pair<int, int> b) {return pair<int, int>(a.first + b.first, a.second + b.second);}, {0, 0}); l.build(vector<pair<int,int>>(c.xs.size())); auto r = l; REP(i, N) { int pos = c.get(a[i]); auto p = r.query(pos, pos + 1); r.set_val(pos, {p.first + a[i], p.second + 1}); } mint ans = 0; REP(i, N) { int pos = c.get(a[i]); auto lval = l.query(pos + 1, c.xs.size()); auto rval = r.query(0, pos); ans += lval.first * rval.second; ans += rval.first * lval.second; ans += a[i] * (rval.second * lval.second); auto lp = l.query(pos, pos + 1); l.set_val(pos, {lp.first + a[i], lp.second + 1}); auto rp = r.query(pos, pos + 1); r.set_val(pos, {rp.first - a[i], rp.second - 1}); } out(ans); }