Submission #1149092

#	Time	Username	Problem	Language	Result	Execution time	Memory
1149092		yeediot	Financial Report (JOI21_financial)	C++20	100 / 100	395 ms	23336 KiB

Main

#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 3e5 + 5;
int a[mxn], to[mxn];
int find(int x){
    return x == to[x] ? x : to[x] = find(to[x]);
}
void merge(int x, int y){
    x = find(x), y = find(y);
    if(x == y) return;
    to[x] = y;
}
struct segtree{
    int seg[4 * mxn];
    void init(){
        memset(seg, 0, sizeof(seg));
    }
    void m(int l, int r, int id, int p, int v){
        if(l == r){
            chmax(seg[id], v);
            return;
        }
        int mm = l + r >> 1;
        if(p <= mm) m(l, mm, id * 2, p, v);
        else m(mm + 1, r, id * 2 + 1, p, v);
        seg[id] = max(seg[id * 2], seg[id * 2 + 1]);
    }
    int qry(int l, int r, int id, int ql, int qr){
        if(qr < l or r < ql) return 0;
        if(ql <= l and r <= qr) return seg[id];
        int mm = l + r >> 1;
        return max(qry(l, mm, id * 2, ql, qr), qry(mm + 1, r, id * 2 + 1, ql, qr));
    }
}tr;
void solve(){
    int n, d, ans = 1;
    cin >> n >> d;
    set<int>used;
    //tr.init();
    vector<pii>ord;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        to[i] = i;
        ord.pb({a[i], -i});
    }
    sort(all(ord));
    for(auto p : ord){
        int i = -p.S;
        auto it = used.insert(i).F;
        if(it != used.begin() and i - *prev(it) <= d) merge(i,*prev(it));
        if(it != prev(used.end()) and *next(it) - *it <= d) merge(*next(it), i);
        int v = tr.qry(1, n, 1, find(i), i - 1) + 1;
        chmax(ans, v);
        tr.m(1, n, 1, i, v);
    }   
    cout << ans << '\n';
}
signed main(){
    TOI_is_so_de;
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 dp[i][j]
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
        std::ifstream file1(p1);
        std::ifstream file2(p2);
        if(!file1.is_open() || !file2.is_open()) return false;
        std::string line1, line2;
        while (getline(file1, line1) && getline(file2, line2)) {
            if (line1 != line2)return false;
        }
        int cnta = 0, cntb = 0;
        while(getline(file1,line1))cnta++;
        while(getline(file2,line2))cntb++;
        return cntb - cnta <= 1;
    };
    bool check = compareFiles("output.txt","expected.txt");
    if(check) cerr<<"ACCEPTED\n";
    else cerr<<"WRONG ANSWER!\n";
}
#else
#endif

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 12 / 12
• Subtask 5: 5 / 5
• Subtask 6: 35 / 35