Submission #1134244

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134244		ByeWorld	Financial Report (JOI21_financial)	C++20	100 / 100	2504 ms	47000 KiB

Main

#include <bits/stdc++.h>
// #define int long long
#define ll long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<char,char> pcc;
typedef pair<int,pii> ipii;
typedef pair<pii,pii> ipiii;
const int MAXN = 3e5+10;
const int SQRT = 610;
const int MAXA = 50;
const int MOD = 1e6+7;
const int INF = 1e9+10;
const int LOG = 30;

int n, d, a[MAXN];
vector <pii> vec, vec2;
int ANS, dp[MAXN], tag[MAXN], las[MAXN];

struct seg {
    int st[4*MAXN];
    int que(int id, int l, int r, int x, int y){
        if(x<=l && r<=y) return st[id];
        if(r<x || y<l) return 0;
        return max(que(lf,l,md,x,y), que(rg,md+1,r,x,y));
    }
    int upd(int id, int l, int r, int x, int p){
        if(l==r && l==x) return st[id] = p;
        if(r<x || x<l)return st[id];
        return st[id] = max(upd(lf,l,md,x,p),upd(rg,md+1,r,x,p));
    }
} A;

struct node{
    ll le,ri,val,sum;
} NOL;
node MAKE(ll x){
    node ret;
    ret.le = ret.ri = ret.val = ret.sum = x;
    return ret;
}
node mer(node a, node b){
    if(a.sum==-INF) return b;
    else if(b.sum==-INF) return a;
        node ret;
        ret.sum = a.sum + b.sum;
        ret.le = max(a.le, a.sum+b.le);
        ret.ri = max(b.ri, a.ri+b.sum);
        ret.val = max(max(a.val, b.val), a.ri+b.le);
    
    return ret;
}
struct seg2 {
    node st[4*MAXN];
    void bd(int id, int l, int r){
        st[id] = MAKE(-n-1);
        if(l==r){  return; }
        bd(lf,l,md); bd(rg,md+1,r);
        st[id] = mer(st[lf],st[rg]);
    }
    node que(int id,int l,int r,int x,int y){
        if(x<=l && r<=y) return st[id];
        if(r<x || y<l) return NOL;
        return mer(que(lf,l,md,x,y), que(rg,md+1,r,x,y));
    }
    node upd(int id,int l,int r,int x,int p){
        if(l==r && x==l) return st[id] = MAKE(p);
        if(r<x || x<l) return st[id];
        return st[id] = mer(upd(lf,l,md,x,p), upd(rg,md+1,r,x,p));
    }
} B;
signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    NOL = MAKE(-INF);
    cin>>n>>d;
    for(int i=1; i<=n; i++){
        cin>>a[i]; vec.pb({a[i],i});
        vec2.pb({a[i],-i});
    }
    sort(vec2.rbegin(), vec2.rend());

    B.bd(1,1,n);
    for(auto [x, id] : vec2){
        id = -id;
        tag[id] = 1; 
        // cout << B.que(1,1,n,1,3).val << ' ' << B.que(1,1,n,2,3).val
        // << ' ' << B.que(1,1,n,1,id).val << " pp\n";
        int l=1, r=id, mid=0, cnt=1;
        while(l<=r){
            mid = md;
            if(B.que(1,1,n,mid,id).val >= d) cnt = mid, l = mid+1;
            else r = mid-1;
        }
        las[id] = cnt;
        B.upd(1,1,n,id,1);
        // int tot = 0;
        // for(int j=id-1; j>=1; j--){
        //     las[id] = j;
        //     if(tag[j]) tot++;
        //     else tot = 0;
        //     if(tot == d) break;
        // }
        // cout << id << ' ' << las[id] << " las\n";
    }
    sort(vec2.begin(), vec2.end());
    for(auto [x, id] : vec2){
        id = -id;
        dp[id] = A.que(1,1,n,las[id],id)+1; A.upd(1,1,n,id,dp[id]);
        ANS = max(ANS, dp[id]);
    }
    cout << ANS << '\n';
}

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