Submission #633414

#	Time	Username	Problem	Language	Result	Execution time	Memory
633414		Lawliet	Radio Towers (IOI22_towers)	C++17	14 / 100	848 ms	1872 KiB

towers

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

using namespace std;

const int maxn = 100010;

int n;

int v[maxn];
int dp[maxn];

void init(int N, std::vector<int> H) {
    n = N;

    for(int i = 1 ; i <= n ; i++)
        v[i] = H[i - 1];

    for(int i = 1 ; i <= n ; i++)
    {
        if( v[i - 1] > v[i] && v[i] < v[i + 1] ) 
            dp[i] = 1;

        dp[i] += dp[i - 1];
    }
}

int max_towers(int L, int R, int D) 
{
    L++; R++;
    int ans = dp[R] - dp[L - 1];

    if( L == R )
        return 1;

    if( v[L - 1] < v[L] && v[L] < v[L + 1] )
        ans++;

    if( v[R - 1] > v[R] && v[R] > v[R + 1] )
        ans++;

    return ans;
}

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