Submission #1007372

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007372		c2zi6	Dancing Elephants (IOI11_elephants)	C++14	50 / 100	9061 ms	12628 KiB

elephants

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "elephants.h"

int n;
int l;
int a[60000];
int b[60000];

void init(int N, int L, int X[]) {
    n = N;
    l = L;
    rep(i, n) b[i] = a[i] = X[i];
    sort(b, b + n);
}

int m = 0;
int st[60000];
void replace(int x, int y) {
    while (b[n-1] > x) {
        st[m++] = b[--n];
    }
    --n;
    while (n && b[n-1] > y) {
        st[m++] = b[--n];
    }
    while (m && st[m-1] < y) {
        b[n++] = st[--m];
    }
    b[n++] = y;
    while (m) {
        b[n++] = st[--m];
    }
}

int update(int i, int y) {
    replace(a[i], y);
    a[i] = y;
    int R = -1e9;
    int ans = 0;
    for (int x : b) {
        if (x > R) ++ans, R = x+l;
    }
    return ans;
}

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