結果
問題 | No.711 競技レーティング単調増加 |
ユーザー |
👑 |
提出日時 | 2024-02-14 13:45:15 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 280 ms / 2,000 ms |
コード長 | 3,920 bytes |
コンパイル時間 | 1,740 ms |
コンパイル使用メモリ | 137,420 KB |
最終ジャッジ日時 | 2025-02-19 13:01:22 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 41 |
ソースコード
//yukicoder@cpp17#include <iostream>#include <iomanip>#include <algorithm>#include <cmath>#include <cctype>#include <climits>#include <cassert>#include <string>#include <vector>#include <set>#include <stack>#include <queue>#include <map>#include <random>#include <bitset>#include <complex>#include <utility>#include <numeric>#include <functional>using namespace std;using ll = long long;using P = pair<ll,ll>;const ll MOD = 998244353;const ll MODx = 1000000007;const int INF = (1<<30)-1;const ll LINF = (1LL<<62LL)-1;const double EPS = (1e-10);P ar4[4] = {{0,1},{0,-1},{1,0},{-1,0}};P ar8[8] = {{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}};template <typename T> vector<T> make_vector(size_t a, T b) { return vector<T>(a, b); }template <typename... Ts> auto make_vector(size_t a, Ts... ts) { return vector<decltype(make_vector(ts...))>(a, make_vector(ts...)); }/*確認ポイントcout << fixed << setprecision(n) << 小数計算//n桁の小数表記になる計算量は変わらないが楽できるシリーズmin(max)_element(iter,iter)で一番小さい(大きい)値のポインタが帰ってくるcount(iter,iter,int)でintがiterからiterの間にいくつあったかを取得できる*//* comment outed because can cause bugs__attribute__((constructor))void initial() {cin.tie(0);ios::sync_with_stdio(false);}*/template< typename T, typename F>struct SegmentTree{private:int n;vector<T> node;F f;T initer;public:SegmentTree(int n_, F f, T initer) : f(f),initer(initer) {n = 1;while(n < n_)n*=2;node.resize(2*n-1, initer);}SegmentTree(int n_, F f,T initer, vector<T> x) : f(f),initer(initer) {n = 1;while(n < n_)n*=2;node.resize(2*n-1, initer);set(x);}void set(vector<T> x){for(int i = 0; (int)x.size() > i; i++){update(i,x[i]);}}void update(int x, T val){x += (n-1);node[x] = val;while(x > 0){x = (x-1)/2;node[x] = f(node[2*x+1],node[2*x+2]);}}void add(int x, T val){x += (n-1);node[x] += val;while(x > 0){x = (x-1)/2;node[x] = f(node[2*x+1],node[2*x+2]);}}T getf(int a,int b, int k=0, int l=0, int r=-1){if(r < 0){r = n-1;}if(r < a || b < l){return initer;}if(a <= l && r <= b){return node[k];}T vl = getf(a,b,2*k+1,l,(l+r)/2);T vr = getf(a,b,2*k+2,(l+r)/2+1,r);return f(vl,vr);}void debug(){int nw = 1;int curr = 1;cout << "---begin---" << endl;for(int i = 0; 2*n-1 > i; i++){cout << node[i] << " ";if(nw == curr)cout << endl,nw *= 2, curr=1;else curr++;}cout << "---end---" << endl;}};template <typename T, typename F>SegmentTree<T, F> get_segment_tree(int N, const F &f, T initer){return SegmentTree<T,F>{N,f,initer};}template <typename T, typename F>SegmentTree<T, F> get_segment_tree(int N, const F &f, T initer, vector<T> x){return SegmentTree<T,F>{N,f,initer,x};}int dp[200010];int main(){int n;cin>>n;vector<long long> A;vector<long long> B;int ans = 0;for(int i = 0; n > i; i++){int x;cin>>x;x-=i;if(x > 0){A.push_back(x);B.push_back(x);}else ans++;}int m = B.size();sort(B.begin(), B.end());B.erase(unique(B.begin(), B.end()), B.end());map<long long, long long> Bc;for(int i = 0; B.size() > i; i++){Bc[B[i]] = i;}auto seg = get_segment_tree(B.size(), [](long long a, long long b){return max(a,b);}, 0LL);for(int i = 0; m > i; i++){auto z = seg.getf(0, Bc[A[i]]);seg.update(Bc[A[i]], z+1);}cout << m-seg.getf(0, B.size()-1)+ans << endl;return 0;}