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Submission #236945

# Submission time Handle Problem Language Result Execution time Memory
236945 2020-06-04T05:05:07 Z aggu_01000101 Tents (JOI18_tents) C++14
100 / 100
 342 ms 70904 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int MOD = 1000000007;
signed main(){
    ios_base::sync_with_stdio(false);
    int h, w;
    cin>>h>>w;
    int dp[h+1][w+1];
    dp[1][1] = 5;
    for(int i = 0;i<=h;i++) dp[i][0] = 1;
    for(int i = 0;i<=w;i++) dp[0][i] = 1;
    for(int i = 2;i<=h;i++){
        dp[i][1] = dp[i-1][1] + (i-1) + 4;
    }
    for(int j = 2;j<=w;j++){
        for(int i = 1;i<=h;i++){
            dp[i][j] = dp[i][j-1];
            dp[i][j]%=MOD;
            dp[i][j] += (((i*(j-1))%MOD)*dp[i-1][j-2])%MOD;
            dp[i][j]%=MOD;
            dp[i][j] += (4*i*dp[i-1][j-1])%MOD;
            dp[i][j]%=MOD;
            if(i>1) dp[i][j] += ((((i*(i-1))/2)%MOD) * (dp[i-2][j-1]))%MOD;
            dp[i][j]%=MOD;
        }
    }
    int ans = (dp[h][w] - 1 + MOD)%MOD;
    cout<<ans<<"\n";
}

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 640 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 7 ms 1024 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 640 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 7 ms 1024 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 225 ms 44284 KB Output is correct
16 Correct 13 ms 3200 KB Output is correct
17 Correct 32 ms 10112 KB Output is correct
18 Correct 44 ms 12408 KB Output is correct
19 Correct 275 ms 51416 KB Output is correct
20 Correct 201 ms 41208 KB Output is correct
21 Correct 123 ms 27128 KB Output is correct
22 Correct 136 ms 26744 KB Output is correct
23 Correct 51 ms 14976 KB Output is correct
24 Correct 331 ms 70904 KB Output is correct
25 Correct 258 ms 52600 KB Output is correct
26 Correct 286 ms 60280 KB Output is correct
27 Correct 342 ms 68216 KB Output is correct