Submission #660850

#	Time	Username	Problem	Language	Result	Execution time	Memory
660850		Danilo21	Financial Report (JOI21_financial)	C++14	100 / 100	488 ms	28364 KiB

Main

#include <bits/stdc++.h>

#define ll long long
#define ld long double
#define pb push_back
#define fi first
#define se second
#define en '\n'
#define sp ' '
#define tb '\t'
#define ri(n) int n; cin >> n
#define rl(n) ll n; cin >> n
#define rs(s) string s; cin >> s
#define rc(c) char c; cin >> c
#define rv(v) for (auto &x : v) cin >> x
#define pven(v) for (auto x : v) cout << x << en
#define pv(v) for (auto x : v) cout << x << sp; cout << en
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define yes cout << "YES" << en
#define no cout << "NO" << en
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define ssort(a, b) if (a < b) swap(a, b)
#define bitcnt(a) (__builtin_popcountll(a))
#define bithigh(a) (63-__builtin_clzll(a))
#define lg bithigh
#define highpow(a) (1LL << (ll)lg(a))

using namespace std;

class segtree{

    int n;
    vector<int> tree;

    int update(int s, int l, int r, int pos, int x){
        if (l > pos || r < pos) return tree[s];
        if (l == r) return tree[s] = x;
        int m = (l + r)>>1;
        int a = update(2*s, l, m, pos, x);
        int b = update(2*s+1, m+1, r, pos, x);
        return tree[s] = max(a, b);
    }

    int query(int s, int l, int r, int ql, int qr) const {
        if (l > qr || r < ql) return 0;
        if (l >= ql && r <= qr) return tree[s];
        int m = (l + r)>>1;
        int a = query(2*s, l, m, ql, qr);
        int b = query(2*s+1, m+1, r, ql, qr);
        return max(a, b);
    }

public:
    void Assign(int s){
        n = highpow(s);
        if (bitcnt(s) > 1) n <<= 1;
        tree.assign(2*n, 0);
    }
    void update(int pos, int x){ update(1, 0, n-1, pos, x); }
    int query(int l, int r) const { return query(1, 0, n-1, l, r); }
};

const ll LINF = 4e18;
const int mxN = 1e6+10, INF = 2e9;
ll n, m, r[mxN], dp[mxN];
array<ll, 2> a[mxN];
segtree st;

void Solve(){

    cin >> n >> m;
    set<int> s;
    for (int i = 0; i < n; i++){
        cin >> a[i][0]; a[i][1] = -i;
        if (i >= m-1) s.insert(i);
    }
    sort(a, a+n);
    for (int i = 0; i < n; i++){
        int j = -a[i][1];
        vector<int> v;
        for (auto it = s.lower_bound(j); it != s.end() && *it < j+m; it++)
            v.pb(*it);
        for (int t : v) s.erase(t);
        auto it = s.lower_bound(j);
        if (it == s.end()) r[j] = n-1;
        else r[j] = *it;
    }
    reverse(a, a+n);
    st.Assign(n);
    int ans = 0;
    for (int i = 0; i < n; i++){
        int j = -a[i][1];
        int cur = st.query(j, r[j])+1;
        smax(ans, cur);
        st.update(j, cur);
    }
    cout << ans << en;
}

int main(){

    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0); cerr.tie(0);
    cout << setprecision(12) << fixed;
    cerr << setprecision(12) << fixed;
    cerr << "Started!" << endl;

    int t = 1;
    //cin >> t;
    while (t--)
        Solve();

    return 0;
}

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