Submission #1267493

#	Time	Username	Problem	Language	Result	Execution time	Memory
1267493		nekolie	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	37 ms	2048 KiB

Main

// Suzune, if you want to ascend to a higher class, struggle with every ounce of strenght you have.
#include <bits/stdc++.h>
using namespace std;

const int baza = (1<<18);
int n,q,x, d[2*baza], odp;
void push(int v) {
    d[2*v] = max(d[2*v],d[v]), d[2*v+1] = max(d[2*v+1],d[v]), d[v] = 0;
}
int value(int i) {
    int w = 0; i += baza;
    while (i > 0)
        w = max(w,d[i]), i >>= 1;
    return w;
}
void ustaw(int i, int val) {
    int v = 1;
    for (int j = 17; j >= 0; j--)
        push(v), v = ((i&(1<<j)) ? 2*v+1 : 2*v);
    d[v] = val;
}
void reset(int l, int r) {
    l += baza-1, r += baza+1;
    while (l/2 != r/2) {
        if ((l&1) == 0)
            d[l+1] = 2;
        if ((r&1) == 1)
            d[r-1] = 2;
        l >>= 1, r >>= 1;
    }
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> q;
    for (int i = 1; i < n; i++)
        d[i+baza] = 1;
    for (int i = 0; i < q; i++) {
        cin >> x;
        if (x > 0) {
            if (value(x) > 0)
                ustaw(x,0);
            else
                odp++, reset(0,x-1), reset(x+1,baza-1);
        }
        else
            ustaw(-x,1);
    }
    cout << odp << endl;
    return 0;
}

• Subtask 1: 29 / 29
• Subtask 2: 34 / 34
• Subtask 3: 22 / 22
• Subtask 4: 15 / 15