結果
問題 | No.1300 Sum of Inversions |
ユーザー | tsuyu93 |
提出日時 | 2020-11-28 12:18:17 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 164 ms / 2,000 ms |
コード長 | 6,328 bytes |
コンパイル時間 | 2,378 ms |
コンパイル使用メモリ | 191,920 KB |
実行使用メモリ | 14,208 KB |
最終ジャッジ日時 | 2024-09-12 22:20:30 |
合計ジャッジ時間 | 7,683 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
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
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 126 ms
11,648 KB |
testcase_04 | AC | 122 ms
11,392 KB |
testcase_05 | AC | 99 ms
9,984 KB |
testcase_06 | AC | 142 ms
12,672 KB |
testcase_07 | AC | 135 ms
12,288 KB |
testcase_08 | AC | 152 ms
13,184 KB |
testcase_09 | AC | 153 ms
13,184 KB |
testcase_10 | AC | 79 ms
8,832 KB |
testcase_11 | AC | 81 ms
8,832 KB |
testcase_12 | AC | 123 ms
11,520 KB |
testcase_13 | AC | 121 ms
11,264 KB |
testcase_14 | AC | 164 ms
14,080 KB |
testcase_15 | AC | 150 ms
12,928 KB |
testcase_16 | AC | 127 ms
11,904 KB |
testcase_17 | AC | 77 ms
8,576 KB |
testcase_18 | AC | 91 ms
9,472 KB |
testcase_19 | AC | 106 ms
10,624 KB |
testcase_20 | AC | 112 ms
10,752 KB |
testcase_21 | AC | 109 ms
10,752 KB |
testcase_22 | AC | 99 ms
9,984 KB |
testcase_23 | AC | 140 ms
12,672 KB |
testcase_24 | AC | 102 ms
10,112 KB |
testcase_25 | AC | 85 ms
9,344 KB |
testcase_26 | AC | 84 ms
9,216 KB |
testcase_27 | AC | 94 ms
9,728 KB |
testcase_28 | AC | 158 ms
13,440 KB |
testcase_29 | AC | 107 ms
10,624 KB |
testcase_30 | AC | 152 ms
13,184 KB |
testcase_31 | AC | 98 ms
10,112 KB |
testcase_32 | AC | 105 ms
10,368 KB |
testcase_33 | AC | 28 ms
10,880 KB |
testcase_34 | AC | 42 ms
11,008 KB |
testcase_35 | AC | 89 ms
14,208 KB |
testcase_36 | AC | 94 ms
14,208 KB |
ソースコード
/* author:ryo3ihara ”継続は力なり、雨だれ石を穿つ” ”slow but steady wins the race” */ #pragma GCC optimize("Ofast") #include<bits/stdc++.h> //#include<atcoder/all> //using namespace atcoder; /* // 多倍長テンプレ #include <boost/multiprecision/cpp_dec_float.hpp> #include <boost/multiprecision/cpp_int.hpp> namespace mp = boost::multiprecision; // 任意長整数型 using Bint = mp::cpp_int; // 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする) using Real = mp::number<mp::cpp_dec_float<1024>>; */ using namespace std; using ll = long long; using ld = long double; using pll = pair<ll, ll>; using pli = pair<ll, int>; using pii = pair<int, int>; using pld = pair<ll, ld>; using ppiii = pair<pii, int>; using ppiill = pair<pii, ll>; using ppllll = pair<pll, ll>; using pplii = pair<pli, int>; using mii = map<int, int>; using dll = deque<ll>; using qll = queue<ll>; using pqll = priority_queue<ll>; using pqrll = priority_queue<ll, vector<ll>, greater<ll>>; using vint = vector<int>; using vll = vector<ll>; using vpll = vector<pll>; using vvll = vector<vector<ll>>; using vvint = vector<vector<int>>; using vvpll = vector<vector<pll>>; //マクロ //forループ #define REP(i,n) for(ll i=0;i<ll(n);i++) #define REPD(i,n) for(ll i=n-1;i>=0;i--) #define FOR(i,a,b) for(ll i=a;i<=ll(b);i++) #define FORD(i,a,b) for(ll i=a;i>=ll(b);i--) #define ALL(x) x.begin(),x.end() #define rALL(x) x.rbegin(),x.rend() #define SIZE(x) ll(x.size()) #define fs first #define sc second //定数 const ll MOD = 1000000007; const int inf = 1e9; const ll INF = 1e18; const ll MAXR = 100000; //10^5:配列の最大のrange inline void Yes(bool b = true) { cout << (b ? "Yes" : "No") << '\n'; } inline void YES(bool b = true) { cout << (b ? "YES" : "NO") << '\n'; } //最大化問題最小化問題 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; } //高速冪乗化 modの時は一部入れ替える ll power(ll x, ll y) { if(y == 1) { return x; } ll ans; if(y % 2 == 1) { ll r = power(x,(y-1)/2); //ans = r * r % MOD; //ans = ans * x % MOD; ans = x * r * r; } else { ll r = power(x,y/2); //ans = r * r % MOD; ans = r * r; } return ans; } /* Bint powerb(Bint x, Bint y) { if(y == 1) { return x; } Bint ans; if(y % 2 == 1) { Bint r = powerb(x,(y-1)/2); //ans = r * r % MOD; //ans = ans * x % MOD; ans = x * r * r; } else { Bint r = powerb(x,y/2); //ans = r * r % MOD; ans = r * r; } return ans; } */ template <class Abel> struct BIT { private: vector<Abel> node; int n; Abel UNITY_SUM = 0; //to be set public: BIT(int n_) { n = n_; node.resize(n, UNITY_SUM); } void clear() { node.assign(n, UNITY_SUM); } //0-indexed void add(int a, Abel w) { for (int i = a; i < n; i |= i + 1)node[i] += w; } //[0,a) Abel sum(int a) { Abel ret = UNITY_SUM; for (int i = a - 1; i >= 0; i = (i&(i + 1)) - 1)ret += node[i]; return ret; } //[a,b) Abel sum(int a, int b) { return sum(b) - sum(a); } //k-th number (k is 0-indexed) int get(int k) { ++k; int res = 0; int n = 1; while(n < (int)node.size()) n *= 2; for(int i = n / 2; i > 0; i /= 2) { if(res + i <= (int)node.size() && node[res + i - 1] < k) { k -= node[res + i - 1]; res += i; } } return res; //0-indexed } //debug void print() { for(int i = 0; i < n; ++i) cout << sum(i, i + 1) << ","; cout << endl; } }; //const int mod = 1000000007; const int mod = 998244353; struct mint { ll x; // typedef long long ll; mint(ll x=0):x((x%mod+mod)%mod){} mint operator-() const { return mint(-x);} mint& operator+=(const mint a) { if ((x += a.x) >= mod) x -= mod; return *this; } mint& operator-=(const mint a) { if ((x += mod-a.x) >= mod) x -= mod; return *this; } mint& operator*=(const mint a) { (x *= a.x) %= mod; return *this;} mint operator+(const mint a) const { return mint(*this) += a;} mint operator-(const mint a) const { return mint(*this) -= a;} mint operator*(const mint a) const { return mint(*this) *= a;} mint pow(ll t) const { if (!t) return 1; mint a = pow(t>>1); a *= a; if (t&1) a *= *this; return a; } // for prime mod mint inv() const { return pow(mod-2);} mint& operator/=(const mint a) { return *this *= a.inv();} mint operator/(const mint a) const { return mint(*this) /= a;} }; istream& operator>>(istream& is, mint& a) { return is >> a.x;} ostream& operator<<(ostream& os, const mint& a) { return os << a.x;} template<typename T> vector<T> compress(vector<T> A){ sort(A.begin(), A.end()); A.erase(unique(A.begin(), A.end()), A.end()); return A; } signed main(){ //入力の高速化用のコード ios::sync_with_stdio(false); cin.tie(nullptr); //入力 int n; cin >> n; vint a(n); REP(i,n) cin >> a[i]; auto coma = compress(a); int sz = (int)coma.size(); BIT <mint> cnt(sz),sum(sz); vector<mint> left(n,0), right(n,0); vector<mint> lsum(n,0),rsum(n,0); REP(i,n){ int pos = lower_bound(ALL(coma),a[i]) - coma.begin(); left[i] = cnt.sum(pos+1,sz); lsum[i] = sum.sum(pos+1,sz); cnt.add(pos, 1); sum.add(pos,a[i]); } cnt.clear(), sum.clear(); REPD(i,n){ int pos = lower_bound(ALL(coma),a[i]) - coma.begin(); right[i] = cnt.sum(0,pos); rsum[i] = sum.sum(0,pos); cnt.add(pos, 1); sum.add(pos,a[i]); } mint ans = 0; REP(i,n){ ans += left[i] * rsum[i] + right[i]*lsum[i]+(mint)a[i]*left[i]*right[i]; } //本文 //出力 cout << ans << endl; //cout << fixed << setprecision(10) << ans << endl; return 0; }