oj.uz

Submission #1036940

# Submission time Handle Problem Language Result Execution time Memory
1036940 2024-07-27T20:15:34 Z arashMLG Skyscraper (JOI16_skyscraper) C++17
100 / 100
 73 ms 51536 KB 
#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...)    69
#define debugArr(...)  69
#endif
using namespace std;

typedef long long     ll;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;

const int N = 100 + 23;
const int M = 1000 + 23;
const ll inf = 1e18;
const ll mod = 1e9 + 7;

#define F           first
#define S           second
#define pb          push_back
#define kill(x)     cout<<x<<endl, exit(0);
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int         ll

void ok(int &x) {
	if(x < 0) x += mod*mod;
	x %= mod;
}

int n,l;
int a[N];
int dp[N][N][M][3];

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    cin>>n>>l;
    for(int i = 1;i <= n ; i ++) cin>>a[i];
    if(n == 1) kill(1);
    sort(a+1,a+n+1);
    a[n+1] = M*M;
    dp[0][0][0][0] = 1;
    for(int i = 1; i<= n; i ++) for(int j=1; j <= i ; j ++) for(int k = 0 ; k <= l;k ++) for(int m = 0; m < 3; m ++) {
    	int cost = (2*j-m)*(a[i+1]-a[i]);
    	if(k-cost < 0 || i + j+ 1-m > n) continue;
    	// halat aval-> componente jadid:
    	ok(dp[i][j][k][m] += dp[i-1][j-1][k-cost][m]);
    	
    	// halat dovom -> componente jadid az yeki az do sar
    	if(m)
    		ok(dp[i][j][k][m] += (3-m)*dp[i-1][j-1][k-cost][m-1]);
    	// halat sevom -> ezafe be tahe component
    	ok(dp[i][j][k][m] += (2 *j - m) * dp[i-1][j][k-cost][m]);
    	
    	// halat 4:
    	if(m == 1) {
    		ok(dp[i][j][k][m] += 2*j * dp[i-1][j][k-cost][m-1]);
    	} else if(m == 2) {
    		if(i == n) {
    			ok(dp[i][j][k][m] += dp[i-1][j][k-cost][m-1]);	
    		} else {
    			ok(dp[i][j][k][m] += (j-1)*dp[i-1][j][k-cost][m-1]);
    		}
    	}
    	// halat 5:
    	if(m == 2 && i == n) {
    		ok(dp[i][j][k][m] += dp[i-1][j+1][k-cost][m]);
    	} else if(m == 2) {
    		ok(dp[i][j][k][m] += j*(j-1)%mod*dp[i-1][j+1][k-cost][m]);
    	} else if(m == 1) {
    		ok(dp[i][j][k][m] += j*j%mod*dp[i-1][j+1][k-cost][m]);
		} else {
			ok(dp[i][j][k][m] += j*(j+1)%mod*dp[i-1][j+1][k-cost][m]);
		}
    }
    int ans =0;
    for(int i = 0 ; i <= l; i ++) ok(ans += dp[n][1][i][2]);
    cout<<ans << '\n';
	return 0;
}

// Jumpsuit, Jumpsuit cover me!
// Jumpsuit, Jumpsuit cover me!

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 0 ms 604 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 0 ms 604 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 0 ms 604 KB Output is correct
21 Correct 2 ms 2396 KB Output is correct
22 Correct 50 ms 35816 KB Output is correct
23 Correct 70 ms 48212 KB Output is correct
24 Correct 64 ms 46928 KB Output is correct
25 Correct 72 ms 51280 KB Output is correct
26 Correct 63 ms 46248 KB Output is correct
27 Correct 25 ms 23632 KB Output is correct
28 Correct 29 ms 26972 KB Output is correct
29 Correct 51 ms 41300 KB Output is correct
30 Correct 73 ms 51536 KB Output is correct