Submission #874955

#	Time	Username	Problem	Language	Result	Execution time	Memory
874955		efedmrlr	Financial Report (JOI21_financial)	C++17	12 / 100	307 ms	31660 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define int long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int (i) = 0; (i)<(n); (i)++)

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}

const int N = 1e5+5;
const int MOD = 1e9+7;
const int INF = 1e12;
const int M = 1e6+5;
const long double EPS = 0.00001;
 
int n,m,q,d;
vector<int> dp, b;
vector<array<int,2> > a;
struct SegTree {
    int sz;
    vector<int> data, lazy;
    SegTree(int sz) {
        this->sz = sz;
        data.assign(4*(sz + 2), 0);
        lazy.assign(4*(sz + 2), -1);

    }
    void push(int v) {
        if(lazy[v] == -1) return;
        data[v*2] = lazy[v];
        data[v*2+1] = lazy[v];
        lazy[v*2] = lazy[v];
        lazy[v*2+1] = lazy[v];
        lazy[v] = -1;
    }
    void update(int tl, int tr ,int v, int l, int r, int val) {
        if(tl >= l && tr <= r) {
            lazy[v] = val;
            data[v] = val;
            return;
        }
        if(tl > r || tr < l) {
            return;
        }
        push(v);
        int tm = (tl + tr) >> 1;
        update(tl, tm, v*2, l, r, val);
        update(tm + 1, tr, v*2+1, l, r, val);
        data[v] = max(data[v*2], data[v*2+1]);
    }
    void update(int l ,int r, int val) {
        update(0, sz, 1, l, r, val);
    }
    int query(int tl, int tr, int v, int l, int r) {
        if(tl >= l && tr <= r) return data[v];
        if(tl > r || tr < l) {
            return 0;
        }
        push(v);
        int tm = (tl + tr) >> 1;
        return max(query(tl, tm, v*2, l, r) , query(tm + 1, tr, v*2+1, l, r));
    }
    int query(int l, int r) {
        return query(0, sz, 1, l, r);
    }
};

void compress() {
    sort(a.begin(), a.end());
    int last = 0;
    int cur = 0;
    for(int i = 0; i<n; i++) {
        if(a[i][0] == last) {
            a[i][0] = cur;
        }
        else {
            last = a[i][0];
            cur++;
            a[i][0] = cur;
        }
    }
    b.assign(n+1, 0);
    for(auto c : a) {
        b[c[1]] = c[0];
    }

}
signed main() {
    fastio();
    cin>>n>>d;
    a.resize(n);
    dp.assign(n + 1, 1);
    REP(i,n) {
        cin>>a[i][0];
        a[i][1] = i + 1;
    }

    compress();
    dp[n] = 1;
    SegTree st(n + 9);
    st.update(b[n], b[n], dp[n]);
    for(int i = n - 1; i>=1; i--) {
        dp[i] = st.query(b[i] + 1, n + 5) + 1;
        st.update(0, b[i] - 1, 0);
        st.update(b[i], b[i], dp[i]);
    }
    int ans = 0;
    for(int i = 1; i<=n; i++) {
        ans = max(ans , dp[i]);
    }
    cout<<ans<<"\n";

}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:8:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    8 | #define REP(i,n) for(int (i) = 0; (i)<(n); (i)++)
      |                          ^
Main.cpp:98:5: note: in expansion of macro 'REP'
   98 |     REP(i,n) {
      |     ^~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 12 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35