oj.uz

Submission #585330

# Submission time Handle Problem Language Result Execution time Memory
585330 2022-06-28T16:37:45 Z Ace Skyscraper (JOI16_skyscraper) C++14
100 / 100
 154 ms 122784 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
const int N = 1e2;
const int L = 1e3;
const ll MOD = 1e9+7;

ll dmod(ll x){
	return x%MOD;
}

int n,l;
int a[N+5];
int memo[N+2][N+2][L+2][3];

int dp(int x, int cc, int sisa, int tepi){
	if(sisa < 0) return 0;
//	printf(">> %d %d %d %d\n", x, cc, sisa, tepi);
	if(x > n){
		if(tepi == 2 && cc == 1) return 1;
		return 0;
	}
	if(tepi == 2 && cc == 1) return 0;
	int &ret = memo[x][cc][sisa][tepi];
	if(ret != -1) return ret;
	ret = 0;
	// nambah cc
	ret = dmod(ret + dmod((ll)(cc+1ll - tepi) * dp(x+1,cc+1,sisa-(2*(cc+1) - tepi)*(a[x+1]-a[x]),tepi)));
	if(tepi < 2) ret = dmod(ret + dmod((ll)(2ll-tepi)*dp(x+1,cc+1,sisa-(2*(cc+1) - tepi - 1)*(a[x+1]-a[x]),tepi+1)));
	// kiri kanan cc
	ret = dmod(ret + dmod((ll)(2ll*cc-tepi) * dp(x+1, cc, sisa-(2*cc - tepi)*(a[x+1]-a[x]),tepi)));
	if(tepi < 2 && cc > 0) ret = dmod(ret + dmod((ll)(2ll-tepi)*dp(x+1,cc,sisa-(2*cc - tepi - 1)*(a[x+1]-a[x]),tepi+1)));
	// join cc
	if(cc >= 2) ret = dmod(ret + dmod((ll)(cc-1ll)*dp(x+1, cc-1, sisa-(2*(cc-1) - tepi)*(a[x+1]-a[x]), tepi)));
//	printf(">> %d %d %d %d = %d\n", x, cc, sisa, tepi, ret);
	return ret;
}

int main(){
	memset(memo,-1,sizeof(memo));
	scanf("%d%d",&n,&l);
	for(int i=1;i<=n;i++){
		scanf("%d",&a[i]);
	}
	sort(a+1,a+n+1);
	a[n+1] = a[n];
	int ans = dp(1,0,l,0);
	if(n == 1) ans = 1;
	printf("%d\n",ans);
	return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:42:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |  scanf("%d%d",&n,&l);
      |  ~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:44:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |   scanf("%d",&a[i]);
      |   ~~~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 122612 KB Output is correct
2 Correct 45 ms 122576 KB Output is correct
3 Correct 46 ms 122648 KB Output is correct
4 Correct 45 ms 122708 KB Output is correct
5 Correct 45 ms 122580 KB Output is correct
6 Correct 44 ms 122676 KB Output is correct
7 Correct 44 ms 122580 KB Output is correct
8 Correct 48 ms 122584 KB Output is correct
9 Correct 51 ms 122576 KB Output is correct
10 Correct 44 ms 122608 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 122740 KB Output is correct
2 Correct 45 ms 122572 KB Output is correct
3 Correct 44 ms 122784 KB Output is correct
4 Correct 46 ms 122584 KB Output is correct
5 Correct 45 ms 122640 KB Output is correct
6 Correct 45 ms 122632 KB Output is correct
7 Correct 46 ms 122608 KB Output is correct
8 Correct 47 ms 122660 KB Output is correct
9 Correct 46 ms 122668 KB Output is correct
10 Correct 49 ms 122572 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 122612 KB Output is correct
2 Correct 45 ms 122576 KB Output is correct
3 Correct 46 ms 122648 KB Output is correct
4 Correct 45 ms 122708 KB Output is correct
5 Correct 45 ms 122580 KB Output is correct
6 Correct 44 ms 122676 KB Output is correct
7 Correct 44 ms 122580 KB Output is correct
8 Correct 48 ms 122584 KB Output is correct
9 Correct 51 ms 122576 KB Output is correct
10 Correct 44 ms 122608 KB Output is correct
11 Correct 45 ms 122740 KB Output is correct
12 Correct 45 ms 122572 KB Output is correct
13 Correct 44 ms 122784 KB Output is correct
14 Correct 46 ms 122584 KB Output is correct
15 Correct 45 ms 122640 KB Output is correct
16 Correct 45 ms 122632 KB Output is correct
17 Correct 46 ms 122608 KB Output is correct
18 Correct 47 ms 122660 KB Output is correct
19 Correct 46 ms 122668 KB Output is correct
20 Correct 49 ms 122572 KB Output is correct
21 Correct 45 ms 122672 KB Output is correct
22 Correct 154 ms 122696 KB Output is correct
23 Correct 103 ms 122696 KB Output is correct
24 Correct 112 ms 122704 KB Output is correct
25 Correct 108 ms 122700 KB Output is correct
26 Correct 104 ms 122700 KB Output is correct
27 Correct 74 ms 122692 KB Output is correct
28 Correct 79 ms 122640 KB Output is correct
29 Correct 131 ms 122700 KB Output is correct
30 Correct 115 ms 122676 KB Output is correct