Submission #1164652

#	Time	Username	Problem	Language	Result	Execution time	Memory
1164652		SmuggingSpun	Radio Towers (IOI22_towers)	C++20	0 / 100	202 ms	8828 KiB

towers

#include "towers.h"
#include<bits/stdc++.h>
using namespace std;
const int lim = 1e5 + 5;
template<class T>void maximize(T& a, T b){
    if(a < b){
        a = b;
    }
}
int n, k, log_v[lim], h[lim], pref[lim], spt[lim][17];
void init(int N, vector<int>H) {
    n = N;
    log_v[0] = -1;
    for(int i = 0; i < n; i++){
        spt[i + 1][0] = h[i + 1] = H[i];
        log_v[i + 1] = log_v[(i + 1) >> 1] + 1;
    }
    for(int j = 1; j < 17; j++){
        for(int i = 1; i + (1 << j) - 1 <= n; i++){
            spt[i][j] = max(spt[i][j - 1], spt[i + (1 << (j - 1))][j - 1]);
        }
    }
    spt[0][0] = spt[n + 1][0] = INT_MAX;
    pref[0] = 0;
    for(int i = 1; i <= n; i++){
        pref[i] = pref[i - 1] + int(spt[i][0] < spt[i - 1][0] && spt[i][0] < spt[i + 1][0]);
    }
}
int get_max(int l, int r){
    int k = log_v[r - l + 1];
    return max(spt[l][k], spt[r - (1 << k) + 1][k]);
}
int max_towers(int l, int r, int d){
    return pref[r + 1] - pref[l];
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23