結果
問題 | No.738 平らな農地 |
ユーザー |
|
提出日時 | 2022-07-13 00:30:01 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 290 ms / 2,000 ms |
コード長 | 6,112 bytes |
コンパイル時間 | 2,347 ms |
コンパイル使用メモリ | 212,736 KB |
最終ジャッジ日時 | 2025-01-30 06:49:03 |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 87 |
ソースコード
#include<bits/stdc++.h>using namespace std;#define rep(i,n) for(ll i=0;i<n;i++)#define repl(i,l,r) for(ll i=(l);i<(r);i++)#define per(i,n) for(ll i=(n)-1;i>=0;i--)#define perl(i,r,l) for(ll i=r-1;i>=l;i--)#define fi first#define se second#define pb push_back#define ins insert#define pqueue(x) priority_queue<x,vector<x>,greater<x>>#define all(x) (x).begin(),(x).end()#define CST(x) cout<<fixed<<setprecision(x)#define vtpl(x,y,z) vector<tuple<x,y,z>>#define rev(x) reverse(x);using ll=long long;using vl=vector<ll>;using vvl=vector<vector<ll>>;using pl=pair<ll,ll>;using vpl=vector<pl>;using vvpl=vector<vpl>;const ll MOD=1000000007;const ll MOD9=998244353;const int inf=1e9+10;const ll INF=4e18;const ll dy[9]={0,-1,0,1,1,1,-1,-1,0};const ll dx[9]={-1,0,1,0,1,-1,1,-1,0};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;}template<typename U = unsigned, int B = 32>class binary_trie {struct node {int cnt;node *ch[2];node() : cnt(0), ch{ nullptr, nullptr } {}};node* add(node* t, U val, int b = B - 1) {if (!t) t = new node;t->cnt += 1;if (b < 0) return t;bool f = (val >> (U)b) & (U)1;t->ch[f] = add(t->ch[f], val, b - 1);return t;}node* sub(node* t, U val, int b = B - 1) {assert(t);t->cnt -= 1;if (t->cnt == 0) return nullptr;if (b < 0) return t;bool f = (val >> (U)b) & (U)1;t->ch[f] = sub(t->ch[f], val, b - 1);return t;}U get_min(node* t, U val, int b = B - 1) const {assert(t);if (b < 0) return 0;bool f = (val >> (U)b) & (U)1; f ^= !t->ch[f];return get_min(t->ch[f], val, b - 1) | ((U)f << (U)b);}U get(node* t, int k, int b = B - 1) const {if (b < 0) return 0;int m = t->ch[0] ? t->ch[0]->cnt : 0;return k < m ? get(t->ch[0], k, b - 1) : get(t->ch[1], k - m, b - 1) | ((U)1 << (U)b);}int count_lower(node* t, U val, int b = B - 1) {if (!t || b < 0) return 0;bool f = (val >> (U)b) & (U)1;return (f && t->ch[0] ? t->ch[0]->cnt : 0) + count_lower(t->ch[f], val, b - 1);}node *root;public:binary_trie() : root(nullptr) {}int size() const {return root ? root->cnt : 0;}bool empty() const {return !root;}void insert(U val) {root = add(root, val);}void erase(U val) {root = sub(root, val);}U max_element(U bias = 0) const {return get_min(root, ~bias);}U min_element(U bias = 0) const {return get_min(root, bias);}int lower_bound(U val) { // return idreturn count_lower(root, val);}int upper_bound(U val) { // return idreturn count_lower(root, val + 1);}U operator[](int k) const {assert(0 <= k && k < size());return get(root, k);}int count(U val) const {if (!root) return 0;node *t = root;for (int i = B - 1; i >= 0; i--) {t = t->ch[(val >> (U)i) & (U)1];if (!t) return 0;}return t->cnt;}};//0-indexed,2冪のセグメントツリーtemplate <class T>struct SegTree {private:int n;// 葉の数vector<T> data;// データを格納するvectorT def; // 初期値かつ単位元function<T(T, T)> operation; // 区間クエリで使う処理function<T(T, T)> change;// 点更新で使う処理T find(int a, int b) {T val_left = def, val_right = def;for (a += (n - 1), b += (n - 1); a < b; a >>= 1, b >>= 1){if ((a & 1) == 0){val_left = operation(val_left, data[a]);}if ((b & 1) == 0){val_right = operation(data[--b],val_right);}}return operation(val_left, val_right);}public:// _n:必要サイズ, _def:初期値かつ単位元, _operation:クエリ関数,// _change:更新関数SegTree(size_t _n, T _def, function<T(T, T)> _operation,function<T(T, T)> _change=[](T a,T b){return b;}): def(_def), operation(_operation), change(_change) {n = 1;while (n < _n) {n *= 2;}data = vector<T>(2 * n - 1, def);}void set(int i, T x) { data[i + n - 1] = x; }void build() {for (int k=n-2;k>=0;k--) data[k] = operation(data[2*k+1],data[2*k+2]);}// 場所i(0-indexed)の値をxで更新void update(int i, T x) {i += n - 1;data[i] = change(data[i], x);while (i > 0) {i = (i - 1) / 2;data[i] = operation(data[i * 2 + 1], data[i * 2 + 2]);}}T all_prod(){return data[0];}// [a, b)の区間クエリを実行T query(int a, int b) {//return _query(a, b, 0, 0, n);return find(a,b);}// 添字でアクセスT operator[](int i) {return data[i + n - 1];}};int main(){ll n,k;cin >> n >> k;vl v(n);rep(i,n)cin >> v[i];vl pls=v;sort(all(pls));pls.erase(unique(all(pls)),pls.end());rep(i,n)v[i]=lower_bound(all(pls),v[i])-pls.begin();binary_trie<ll> bt;ll m=pls.size();SegTree<pl> st(m,{0,0},[](pl a,pl b){return make_pair(a.first+b.first,a.second+b.second);},[](pl a,pl b){return make_pair(a.first+b.first,a.second+b.second);});rep(i,k){bt.insert(v[i]);st.update(v[i],{pls[v[i]],1});}ll ans=INF;rep(i,n-k+1){ll mid=bt[k/2];auto f=st.query(mid,m);ll ret=f.first-pls[mid]*f.second;auto g=st.query(0,mid);ret+=pls[mid]*g.second-g.first;chmin(ans,ret);if(i==n-k)break;bt.erase(v[i]);st.update(v[i],{-pls[v[i]],-1});bt.insert(v[k+i]);st.update(v[k+i],{pls[v[k+i]],1});}cout << ans << endl;}