oj.uz

Submission #78495

# Submission time Handle Problem Language Result Execution time Memory
78495 2018-10-05T13:48:18 Z nxteru Tents (JOI18_tents) C++14
100 / 100
 219 ms 71272 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <cstdio>
#include <cstring>
#include <string>
#include <math.h>
using namespace std;
typedef long long ll;
typedef double D;
typedef pair<int,int> P;
#define M 1000000007
#define F first
#define S second
#define PB push_back
#define INF 1000000000
ll h,w,dp[3005][3005],ans=-1;
int main(void){
    scanf("%lld%lld",&h,&w);
    dp[h][w]=1;
    for(ll i=h;i>0;i--){
        for(ll j=w;j>=0;j--){
            if(j>=2)dp[i-1][j-2]=(dp[i-1][j-2]+dp[i][j]*(j*(j-1)/2)%M)%M;
            if(j>0)dp[i-1][j-1]=(dp[i-1][j-1]+dp[i][j]*4*j%M)%M;
            if(i>=2&&j>0)dp[i-2][j-1]=(dp[i-2][j-1]+dp[i][j]*(i-1)*j%M)%M;
            dp[i-1][j]=(dp[i-1][j]+dp[i][j])%M;
        }
    }
    for(int j=0;j<=w;j++)ans=(ans+dp[0][j])%M;
    printf("%lld\n",ans);
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&h,&w);
     ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 584 KB Output is correct
4 Correct 3 ms 1228 KB Output is correct
5 Correct 3 ms 1228 KB Output is correct
6 Correct 4 ms 1536 KB Output is correct
7 Correct 3 ms 1536 KB Output is correct
8 Correct 4 ms 1612 KB Output is correct
9 Correct 3 ms 1612 KB Output is correct
10 Correct 4 ms 1948 KB Output is correct
11 Correct 2 ms 1948 KB Output is correct
12 Correct 5 ms 2388 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 584 KB Output is correct
4 Correct 3 ms 1228 KB Output is correct
5 Correct 3 ms 1228 KB Output is correct
6 Correct 4 ms 1536 KB Output is correct
7 Correct 3 ms 1536 KB Output is correct
8 Correct 4 ms 1612 KB Output is correct
9 Correct 3 ms 1612 KB Output is correct
10 Correct 4 ms 1948 KB Output is correct
11 Correct 2 ms 1948 KB Output is correct
12 Correct 5 ms 2388 KB Output is correct
13 Correct 2 ms 2388 KB Output is correct
14 Correct 13 ms 9988 KB Output is correct
15 Correct 154 ms 55596 KB Output is correct
16 Correct 14 ms 55596 KB Output is correct
17 Correct 34 ms 55596 KB Output is correct
18 Correct 48 ms 55596 KB Output is correct
19 Correct 170 ms 63260 KB Output is correct
20 Correct 137 ms 63260 KB Output is correct
21 Correct 124 ms 63260 KB Output is correct
22 Correct 92 ms 63260 KB Output is correct
23 Correct 60 ms 63260 KB Output is correct
24 Correct 219 ms 71272 KB Output is correct
25 Correct 173 ms 71272 KB Output is correct
26 Correct 192 ms 71272 KB Output is correct
27 Correct 218 ms 71272 KB Output is correct