Submission #771828

#	Time	Username	Problem	Language	Result	Execution time	Memory
771828		Magikarp4000	Holiday (IOI14_holiday)	C++17	47 / 100	5072 ms	10988 KiB

holiday

#include "holiday.h"
#include <bits/stdc++.h>
using namespace std;
#define OPTM ios_base::sync_with_stdio(0); cin.tie(0);
#define INF int(1e9+7)
#define ln '\n' 
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define us unsigned short
#define FOR(i,s,n) for (int i = s; i < n; i++)
#define FORR(i,n,s) for (int i = n; i > s; i--)
#define FORX(u, arr) for (auto u : arr)
#define PB push_back
#define in(v,x) (v.find(x) != v.end())
#define F first
#define S second
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define UM unordered_map
#define US unordered_set
#define PQ priority_queue
#define ALL(v) v.begin(), v.end()
const ll LLINF = 1e18+1;
#define int long long

struct Node {
    int x,cnt;
};

const int MAXN = 1e5+1;
int n,d;
int a[MAXN];
Node st[MAXN*4+10];
vector<PII> v;
int perm[MAXN];

void update(int s, int tl, int tr, int idx, int val) {
    if (tl == tr) {
        if (val == -1) {
            st[s].x = 0LL;
            st[s].cnt = 0;
        }
        else {
            st[s].x = val;
            st[s].cnt = 1;
        }
    }
    else {
        int tm = (tl+tr)/2;
        if (idx <= tm) update(s*2,tl,tm,idx,val);
        else update(s*2+1,tm+1,tr,idx,val);
        st[s].x = st[s*2].x+st[s*2+1].x;
        st[s].cnt = st[s*2].cnt+st[s*2+1].cnt;
    }
}

int query(int s, int tl, int tr, int l, int r, int t) {
    if (l <= tl && r >= tr) return t == 0 ? st[s].x : st[s].cnt;
    else {
        int tm = (tl+tr)/2;
        int cur = 0LL;
        if (l <= tm) cur += query(s*2,tl,tm,l,r,t);
        if (r > tm) cur += query(s*2+1,tm+1,tr,l,r,t);
        return cur;
    }
}

int walk(int s, int tl, int tr, int val) {
    if (tl == tr) return tl;
    int tm = (tl+tr)/2;
    if (query(1,0,n-1,tm+1,n-1,1) >= val) return walk(s*2+1,tm+1,tr,val);
    else return walk(s*2,tl,tm,val);
}

long long findMaxAttraction(int32_t N, int32_t start, int32_t D, int32_t A[]) {
    n = N, d = D;
    FOR(i,0,n) {
        a[i] = A[i];
        v.PB({a[i],i});
    }
    sort(ALL(v));
    FOR(i,0,n) perm[v[i].S] = i;
    int res = 0LL;
    FOR(i,0,start+1) {
        FOR(j,i,start+1) update(1,0,n-1,perm[j],a[j]);
        FOR(j,start,n) {
            update(1,0,n-1,perm[j],a[j]);
            int used = (j-i) + min(j-start, start-i);
            int idx = walk(1,0,n-1,d-used);
            // cout << i << " " << j << " " << idx << ": ";
            // FOR(k,0,n) cout << query(1,0,n-1,k,k,0) << " ";
            // cout << ln;
            res = max(res, query(1,0,n-1,idx,n-1,0));
        }
        FOR(j,0,n*4+10) st[j].x = st[j].cnt = 0LL;
    }
    return res;
}

• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 17 / 17
• Subtask 4: 0 / 53