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Submission #199911

# Submission time Handle Problem Language Result Execution time Memory
199911 2020-02-04T00:35:49 Z CaroLinda Skyscraper (JOI16_skyscraper) C++14
100 / 100
 483 ms 6780 KB 
#include <bits/stdc++.h>

const int MOD = 1e9+7 ;
const int MAXN = 105 ;
const int MAXL = 1005 ;

using namespace std ;

int N , L ; 
int F[MAXN] , idx[MAXN] ;
long long dp[2][2][MAXN][2][MAXL] ;

inline void f(long long &x, long long y) { x = (x+y) % MOD ; }

int main()
{
	scanf("%d%d", &N , &L ) ;
	for(int i = 1 ; i <= N ; i++ ) scanf("%d", &F[i] ) ;
	sort(F+1, F+1+N ) ;

	if( N == 1 )
	{
		printf("1\n") ;
		return 0 ;
	}

	for(int i = 1 ; i<= N+1 ; i++ ) idx[i] = i%2 ;

	for(int i = N ; i > 0 ; i-- )
		for(int lef = 0 ; lef < 2 ; lef++ )
			for(int c = 0 ; c <= N ; c++ )
				for(int rig = 0 ; rig < 2 ; rig ++ )
					for(int cost = 0 ; cost <= L ; cost ++ )
					{


						long long &x = dp[ idx[i] ][lef][c][rig][cost] ;
						x = 0 ;
						int new_cost = cost + ( F[i] - F[i-1] ) * ( 2*c + lef + rig ) ;

						if( new_cost > L ) continue ;

						int id = idx[i+1] ;

						if( i == N )
						{
							x = ( c == 0 ? 1 : 0 ) ;
							continue ;
						}

						if( c > 0 )
						{
							f( x , dp[id][1][c-1][rig][new_cost] * c ) ; 
							f( x , dp[id][lef][c-1][1][new_cost] * c ) ;
							f( x , dp[id][lef][c-1][rig][new_cost] * c * (c-1) ) ;
						}

						f( x , dp[id][1][c][rig][ new_cost ] ) ; //soh coloquei na esquerda 

						f( x , dp[id][lef][c][1][ new_cost ] ) ;

						f( x , dp[id][lef][c+1][rig][ new_cost ] ) ;
						f( x , dp[id][lef][c][rig][ new_cost ] * 2 * c ) ;


					}

		printf("%lld\n" , dp[1][0][0][0][0]) ;

}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:29:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i = N ; i > 0 ; i-- )
  ^~~
skyscraper.cpp:68:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   printf("%lld\n" , dp[1][0][0][0][0]) ;
   ^~~~~~
skyscraper.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N , &L ) ;
  ~~~~~^~~~~~~~~~~~~~~~~~
skyscraper.cpp:18:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 1 ; i <= N ; i++ ) scanf("%d", &F[i] ) ;
                                 ~~~~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 632 KB Output is correct
5 Correct 7 ms 888 KB Output is correct
6 Correct 7 ms 888 KB Output is correct
7 Correct 6 ms 760 KB Output is correct
8 Correct 5 ms 632 KB Output is correct
9 Correct 9 ms 888 KB Output is correct
10 Correct 5 ms 632 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 764 KB Output is correct
2 Correct 6 ms 888 KB Output is correct
3 Correct 6 ms 888 KB Output is correct
4 Correct 6 ms 892 KB Output is correct
5 Correct 6 ms 888 KB Output is correct
6 Correct 6 ms 892 KB Output is correct
7 Correct 5 ms 888 KB Output is correct
8 Correct 5 ms 892 KB Output is correct
9 Correct 6 ms 888 KB Output is correct
10 Correct 6 ms 888 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 632 KB Output is correct
5 Correct 7 ms 888 KB Output is correct
6 Correct 7 ms 888 KB Output is correct
7 Correct 6 ms 760 KB Output is correct
8 Correct 5 ms 632 KB Output is correct
9 Correct 9 ms 888 KB Output is correct
10 Correct 5 ms 632 KB Output is correct
11 Correct 6 ms 764 KB Output is correct
12 Correct 6 ms 888 KB Output is correct
13 Correct 6 ms 888 KB Output is correct
14 Correct 6 ms 892 KB Output is correct
15 Correct 6 ms 888 KB Output is correct
16 Correct 6 ms 892 KB Output is correct
17 Correct 5 ms 888 KB Output is correct
18 Correct 5 ms 892 KB Output is correct
19 Correct 6 ms 888 KB Output is correct
20 Correct 6 ms 888 KB Output is correct
21 Correct 7 ms 1784 KB Output is correct
22 Correct 483 ms 5368 KB Output is correct
23 Correct 440 ms 6648 KB Output is correct
24 Correct 425 ms 6648 KB Output is correct
25 Correct 462 ms 6776 KB Output is correct
26 Correct 404 ms 6648 KB Output is correct
27 Correct 164 ms 5240 KB Output is correct
28 Correct 222 ms 5496 KB Output is correct
29 Correct 430 ms 6780 KB Output is correct
30 Correct 463 ms 6776 KB Output is correct