oj.uz

답안 #932876

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
932876 2024-02-24T10:37:06 Z parlimoos Skyscraper (JOI16_skyscraper) C++14
15 / 100
 189 ms 91208 KB 
//Be Name KHODA
#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
#define pb push_back
#define pp pop_back
#define lb lower_bound
#define ub upper_bound
#define cl clear
#define bg begin
#define arr(x) array<int , x>
#define endl '\n'

const int MOD = int(1e9) + 7;

int n , k;
vector<int> a;
int dp[(1 << 14)][14][101];

void Add(int &e , int b){
    e += b;
    if(e > MOD) e -= MOD;
    if(e < 0) e += MOD;
}
int Mul(int a , int b){
    return (1ll * a * b) % MOD;
}
int Pow(int a , int b){
    int res = 1;
    while(b){
        if((b & 1)) res = Mul(res , a);
        a = Mul(a , a) , b >>= 1;
    }
    return res;
}
void f(){
    for(int bit = 0 ; bit < n ; bit++){
        dp[(1 << bit)][bit][0] = 1;
    }
    for(int msk = 1 ; msk < (1 << 14) ; msk++){
        for(int bit0 = 0 ; bit0 < n ; bit0++){
            if(((msk >> bit0) & 1)) continue;
            for(int bit1 = 0 ; bit1 < n ; bit1++){
                if(!((msk >> bit1) & 1)) continue;
                for(int sm = 0 ; sm <= k ; sm++){
                    if(sm + abs(a[bit0] - a[bit1]) > k) continue;
                    Add(dp[msk | (1 << bit0)][bit0][sm + abs(a[bit0] - a[bit1])] , dp[msk][bit1][sm]);
                }
            }
        }
    }
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> k;
    for(int i = 0 ; i < n ; i++){
        int d;
        cin >> d;
        a.pb(d);
    }
    int o = 0;
    if(n <= 8){
        for(int i = 0 ; i < (8 * 7 * 6 * 5 * 4 * 3 * 2) ; i++){
            int sm = 0;
            for(int j = 1 ; j < n ; j++) sm += abs(a[j] - a[j - 1]);
            if(sm <= k) o++;
            next_permutation(a.bg() , a.end());
        }
    }else{
        f();
        for(int end = 0 ; end < n ; end++){
            for(int sm = 0 ; sm <= k ; sm++){
                Add(o , dp[(1 << n) - 1][end][sm]);
            }
        }
    }
    cout << o;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 132 ms 90704 KB Output is correct
2 Correct 185 ms 90968 KB Output is correct
3 Correct 113 ms 90960 KB Output is correct
4 Correct 185 ms 90960 KB Output is correct
5 Correct 178 ms 91060 KB Output is correct
6 Correct 189 ms 90976 KB Output is correct
7 Correct 95 ms 90960 KB Output is correct
8 Correct 115 ms 90932 KB Output is correct
9 Correct 150 ms 90964 KB Output is correct
10 Correct 170 ms 91208 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -