oj.uz

Submission #284874

# Submission time Handle Problem Language Result Execution time Memory
284874 2020-08-28T07:24:59 Z arnold518 Žarulje (COI15_zarulje) C++14
22 / 100
 18 ms 16384 KB 
#include <bits/stdc++.h>
using namespace std;

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

const int MAXN = 2000;
const int MOD = 1e9+7;

int N, A[MAXN+10], Q;
int dp[MAXN+10][MAXN+10];

int solve(int l, int r)
{
	if(l==1 && r==N) return 1;
	int &ret=dp[l][r];
	if(ret!=-1) return ret;

	if(l==0) return ret=solve(l, r+1);
	if(r==N) return ret=solve(l-1, r);
	if(A[l-1]<A[r+1]) return ret=solve(l, r+1);
	if(A[l-1]>A[r+1]) return ret=solve(l-1, r);
	return ret=(solve(l-1, r)+solve(l, r+1))%MOD;
}

int main()
{
	scanf("%d%d", &N, &Q);
	for(int i=1; i<=N; i++) scanf("%d", &A[i]);
	memset(dp, -1, sizeof(dp));

	while(Q--)
	{
		int k;
		scanf("%d", &k);
		printf("%d\n", solve(k, k));
	}
}

Compilation message

zarulje.cpp: In function 'int main()':
zarulje.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   29 |  scanf("%d%d", &N, &Q);
      |  ~~~~~^~~~~~~~~~~~~~~~
zarulje.cpp:30:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |  for(int i=1; i<=N; i++) scanf("%d", &A[i]);
      |                          ~~~~~^~~~~~~~~~~~~
zarulje.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |   scanf("%d", &k);
      |   ~~~~~^~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 16128 KB Output is correct
2 Correct 10 ms 16256 KB Output is correct
3 Correct 18 ms 16384 KB Output is correct
4 Correct 12 ms 16256 KB Output is correct
5 Correct 11 ms 16256 KB Output is correct
6 Correct 11 ms 16256 KB Output is correct

Subtask #2
0 / 38.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 16384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 16128 KB Output is correct
2 Correct 10 ms 16256 KB Output is correct
3 Correct 18 ms 16384 KB Output is correct
4 Correct 12 ms 16256 KB Output is correct
5 Correct 11 ms 16256 KB Output is correct
6 Correct 11 ms 16256 KB Output is correct
7 Incorrect 11 ms 16384 KB Output isn't correct
8 Halted 0 ms 0 KB -