oj.uz

Submission #45875

# Submission time Handle Problem Language Result Execution time Memory
45875 2018-04-16T09:55:26 Z 3zp Tents (JOI18_tents) C++14
100 / 100
 207 ms 71268 KB 
#include<bits/stdc++.h>
using namespace std;
long long dp[3009][3009];
long long mod = 1e9+7;
main(){
    long long H,W;
    cin >> H>> W;
    for (long long i = 1; i<= H; i++){
        dp[i][1]= i*(i-1)/2+4*i+1;
        dp[i][0]= 1;
    }
    for (long long j=1; j<=W; j++){
        dp[1][j] =j*(j-1)/2+4*j+1;
        dp[0][j] = 1;
    }
    for(long long i =2; i<= H; i++){
        for (long long j =  2; j<= W; j++){
            dp[i][j]= (dp[i-1][j]+(4*j*dp[i-1][j-1])+j*(i-1)*dp[i-2][j-1]+j*(j-1)/2*dp[i-1][j-2])%mod;
        }
    }
    cout<<(dp[H][W] + mod -1 )%mod<<endl;
}

Compilation message

tents.cpp:5:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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 472 KB Output is correct
3 Correct 2 ms 652 KB Output is correct
4 Correct 3 ms 1240 KB Output is correct
5 Correct 2 ms 1240 KB Output is correct
6 Correct 3 ms 1516 KB Output is correct
7 Correct 3 ms 1516 KB Output is correct
8 Correct 3 ms 1696 KB Output is correct
9 Correct 2 ms 1696 KB Output is correct
10 Correct 4 ms 2004 KB Output is correct
11 Correct 2 ms 2004 KB Output is correct
12 Correct 4 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 472 KB Output is correct
3 Correct 2 ms 652 KB Output is correct
4 Correct 3 ms 1240 KB Output is correct
5 Correct 2 ms 1240 KB Output is correct
6 Correct 3 ms 1516 KB Output is correct
7 Correct 3 ms 1516 KB Output is correct
8 Correct 3 ms 1696 KB Output is correct
9 Correct 2 ms 1696 KB Output is correct
10 Correct 4 ms 2004 KB Output is correct
11 Correct 2 ms 2004 KB Output is correct
12 Correct 4 ms 2388 KB Output is correct
13 Correct 2 ms 2388 KB Output is correct
14 Correct 8 ms 10068 KB Output is correct
15 Correct 126 ms 55568 KB Output is correct
16 Correct 12 ms 55568 KB Output is correct
17 Correct 28 ms 55568 KB Output is correct
18 Correct 34 ms 55568 KB Output is correct
19 Correct 130 ms 63204 KB Output is correct
20 Correct 108 ms 63204 KB Output is correct
21 Correct 78 ms 63204 KB Output is correct
22 Correct 93 ms 63204 KB Output is correct
23 Correct 69 ms 63204 KB Output is correct
24 Correct 207 ms 71268 KB Output is correct
25 Correct 131 ms 71268 KB Output is correct
26 Correct 149 ms 71268 KB Output is correct
27 Correct 169 ms 71268 KB Output is correct