Submission #1193153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1193153		Fikrat_Asadzadeh	Skyscraper (JOI16_skyscraper)	C++20	0 / 100	1 ms	584 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;

const int MOD = 1'000'000'007;
static int dp[105][105][1005];

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int N, L;
    cin >> N >> L;
    vector<int> A(N);
    for(int i = 0; i < N; i++) 
        cin >> A[i];

    sort(A.begin(), A.end());
    vector<int> D(N);
    for(int i = 0; i + 1 < N; i++)
        D[i] = A[i+1] - A[i];

    dp[1][1][0] = 1;
    int minimal = 0;
    for(int i = 0; i + 1 < N; i++) minimal += D[i];

    for(int i = 1; i < N; i++){
        for(int k = 1; k <= i; k++){
            for(int s = 0; s <= L; s++){
                int ways = dp[i][k][s];
                if(!ways) continue;

                dp[i+1][k+1][s] = (dp[i+1][k+1][s] + ways) % MOD;

                int ns = s + k * D[i];
                if(ns <= L){
                    dp[i+1][k][ns] = (dp[i+1][k][ns] + ways) % MOD;
                }
            }
        }
    }

    int ans = 0;
    for(int s = 0; s <= L; s++){
        if(minimal + 2*s <= L){
            ans = (ans + dp[N][1][s]) % MOD;
        }
    }

    cout << ans << "\n";
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80