Submission #535812

#	Time	Username	Problem	Language	Result	Execution time	Memory
535812		makanhulia	A Huge Tower (CEOI10_tower)	C++17	20 / 100	1095 ms	13300 KiB

tower

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const ll mod = 1e9+9;

vector<ll>v;
vector<ll>tmp;
vector<bool>mark;
ll n, d;

ll f(int idx, ll last){
    if(idx == n){
        return 1;
    }

    ll ret = 0;

    for(int i = 0; i < n; i++){
        if(!mark[i] && (v[i] <= last + d)){
            //cout << "can stack " << v[i] << " on top of " << last << endl;
            mark[i] = true;
            tmp.push_back(v[i]);
            ret += f(idx + 1, v[i]);
            mark[i] = false;
            tmp.pop_back();
        }
    }

    return (ret % mod);
}

int main(){
    cin >> n >> d;

    for(int i = 0; i < n; i++){
        ll x; cin >> x;
        v.push_back(x);
        mark.push_back(0);
    }

    cout << (f(0, 1e9) % mod) << endl;

    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 0 / 5
• Subtask 11: 0 / 5
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• Subtask 14: 0 / 5
• Subtask 15: 0 / 5
• Subtask 16: 0 / 5
• Subtask 17: 0 / 5
• Subtask 18: 0 / 5
• Subtask 19: 0 / 5
• Subtask 20: 0 / 5