Submission #1182160

#	Time	Username	Problem	Language	Result	Execution time	Memory
1182160		mecukuryurt	Mountains (NOI20_mountains)	C++20	36 / 100	2096 ms	2628 KiB

Mountains

#include <iostream>

#define lli long long int

using namespace std;

lli dp(lli *arr, int n, int sel, lli lst) {
    // cout << arr << "-" << n << "-" << sel << "-" << lst << endl;
    if (sel <= 0) return 1;
    lli sum=0;
    if ((sel == 1) || (sel==3)) {
        for (int i=0; i<n; i++) {
            if (lst > arr[i]) sum+=dp(arr+i+1, n-i-1, sel-1, arr[i]);
        }
    }
    if (sel == 2) {
        for (int i=0; i<n; i++) {
            if (lst < arr[i]) sum+=dp(arr+i+1, n-i-1, sel-1, arr[i]);
        }
    }
    return sum;
}

int main()
{   
    int n;
    cin >> n;
    
    lli arr[n];
    
    for (int i=0; i<n;i++) {
        cin >> arr[i];
    }
    
    cout << dp(arr, n, 3, 1000000000000000000);

    return 0;
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 9
• Subtask 4: 36 / 36
• Subtask 5: 0 / 28
• Subtask 6: 0 / 9
• Subtask 7: 0 / 12