oj.uz

Submission #145635

# Submission time Handle Problem Language Result Execution time Memory
145635 2019-08-20T14:21:07 Z cheetose Kangaroo (CEOI16_kangaroo) C++11
100 / 100
 36 ms 31608 KB 
#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const ll MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };

ll d[2001][2001];
int main() {
	int n,S,E;
	scanf("%d%d%d",&n,&S,&E);
	d[0][0]=1;
	int t=0;
	fup(i,1,n,1)
	{
		fup(j,1,n,1)
		{
			if(i==S || i==E)d[i][j]=(d[i-1][j]+d[i-1][j-1])%MOD;
			else d[i][j]=(d[i-1][j+1]*j+d[i-1][j-1]*(j-t))%MOD;
		}
		if(i==S || i==E)t++;
	}
	printf("%lld",d[n][1]);
}

Compilation message

kangaroo.cpp: In function 'int main()':
kangaroo.cpp:66:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&S,&E);
  ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 488 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 488 KB Output is correct
12 Correct 3 ms 1400 KB Output is correct
13 Correct 3 ms 1400 KB Output is correct
14 Correct 3 ms 1400 KB Output is correct
15 Correct 3 ms 1400 KB Output is correct
16 Correct 3 ms 1400 KB Output is correct
17 Correct 3 ms 1396 KB Output is correct
18 Correct 3 ms 1272 KB Output is correct
19 Correct 3 ms 1400 KB Output is correct
20 Correct 3 ms 1400 KB Output is correct

Subtask #4
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 488 KB Output is correct
12 Correct 3 ms 1400 KB Output is correct
13 Correct 3 ms 1400 KB Output is correct
14 Correct 3 ms 1400 KB Output is correct
15 Correct 3 ms 1400 KB Output is correct
16 Correct 3 ms 1400 KB Output is correct
17 Correct 3 ms 1396 KB Output is correct
18 Correct 3 ms 1272 KB Output is correct
19 Correct 3 ms 1400 KB Output is correct
20 Correct 3 ms 1400 KB Output is correct
21 Correct 8 ms 6392 KB Output is correct
22 Correct 9 ms 6904 KB Output is correct
23 Correct 9 ms 7800 KB Output is correct
24 Correct 36 ms 31608 KB Output is correct
25 Correct 36 ms 31608 KB Output is correct
26 Correct 36 ms 31608 KB Output is correct
27 Correct 36 ms 31480 KB Output is correct
28 Correct 26 ms 23800 KB Output is correct