Submission #269284

#	Time	Username	Problem	Language	Result	Execution time	Memory
269284		PeppaPig	Dancing Elephants (IOI11_elephants)	C++14	26 / 100	9037 ms	2560 KiB

elephants

#include "elephants.h"
#include <bits/stdc++.h>

#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 1.5e5 + 5;

int n, k, B, pos[N];
set<pii> S;

void init(int _n, int _k, int X[]) {
    n = _n, k = _k;

    for(int i = 0; i < n; i++) S.emplace(X[i], i), pos[i] = X[i];
}

int update(int i, int y) {
    S.erase(pii(pos[i], i));
    S.emplace(pos[i] = y, i);

    auto it = S.begin();
    int cnt = 1;
    while(1) {
        pii now = *it;
        auto nex = S.upper_bound(pii(now.x + k + 1, -1e9));
        if(nex == S.end()) break;
        it = nex, ++cnt;
    }

    return cnt;
}

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3