Submission #1240537

#	Time	Username	Problem	Language	Result	Execution time	Memory
1240537		skibidi123	Financial Report (JOI21_financial)	C++20	5 / 100	222 ms	40348 KiB

Main

#include <bits/stdc++.h>
#define long long long
using namespace std;

struct Seg {
    int n;
    vector<int> t;
    Seg(int _n): n(_n), t(4*n+4, 0) {}
    void upd(int p, int v, int i, int l, int r) {
        if(l==r) { t[i]=v; return; }
        int m=(l+r)>>1;
        if(p<=m) upd(p,v,2*i,l,m);
        else      upd(p,v,2*i+1,m+1,r);
        t[i]=max(t[2*i],t[2*i+1]);
    }
    int query(int L, int R, int i, int l, int r) {
        if(R<l||r<L) return 0;
        if(L<=l&&r<=R) return t[i];
        int m=(l+r)>>1;
        return max(query(L,R,2*i,l,m), query(L,R,2*i+1,m+1,r));
    }
};

void init(){
    #define task "main"
    if(fopen(task".INP","r")){
        freopen(task".INP","r",stdin);
        freopen(task".OUT","w",stdout);
    }
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main(){
    init();
    int n, d;
    cin >> n >> d;
    vector<long> a(n);
    for(int i=0;i<n;i++) cin >> a[i];
    vector<long> v = a;
    sort(v.begin(), v.end());
    v.erase(unique(v.begin(), v.end()), v.end());
    int M = v.size();
    vector<int> c(n);
    for(int i=0;i<n;i++){
        c[i] = lower_bound(v.begin(), v.end(), a[i]) - v.begin();
    }
    Seg st(M);
    vector<multiset<int>> ms(M);
    vector<int> dp(n);
    int res = 0;
    for(int i=0;i<n;i++){
        if(i-d-1 >= 0){
            int u = c[i-d-1];
            auto it = ms[u].find(dp[i-d-1]);
            ms[u].erase(it);
            int mv = ms[u].empty() ? 0 : *ms[u].rbegin();
            st.upd(u, mv, 1, 0, M-1);
        }
        int u = c[i];
        int best = u>0 ? st.query(0, u-1, 1, 0, M-1) : 0;
        dp[i] = best + 1;
        ms[u].insert(dp[i]);
        st.upd(u, *ms[u].rbegin(), 1, 0, M-1);
        res = max(res, dp[i]);
    }
    cout << res << "\n";
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void init()':
Main.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         freopen(task".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         freopen(task".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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