oj.uz

Submission #338017

# Submission time Handle Problem Language Result Execution time Memory
338017 2020-12-22T09:06:22 Z BeanZ Tents (JOI18_tents) C++14
100 / 100
 413 ms 71404 KB 
// I_Love_LPL
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int N = 3005;
long long mod = 1e9 + 7;
const int lim = 700;
const int lg = 18;
const int base = 311;
const long double eps = 1e-6;
ll dp[N][N];
ll DP(ll h, ll w){
    if (h == 0 || w == 0) return 1;
    if (dp[h][w] != -1) return dp[h][w];
    ll res = 0;
    res = res + w * 4 * DP(h - 1, w - 1);
    res = res + DP(h - 1, w);
    if (h > 1) res = res + (h - 1) * w * DP(h - 2, w - 1);
    if (w > 1) res = res + w * (w - 1) / 2 * DP(h - 1, w - 2);
    res = res % mod;
    return dp[h][w] = res;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("tests.inp", "r")){
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ll h, w;
    cin >> h >> w;
    memset(dp, -1, sizeof(dp));
    cout << (DP(h, w) - 1 + mod) % mod;
}
/*

Out:
*/

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   28 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
tents.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   29 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 71020 KB Output is correct
2 Correct 39 ms 71148 KB Output is correct
3 Correct 40 ms 71020 KB Output is correct
4 Correct 38 ms 71020 KB Output is correct
5 Correct 39 ms 71148 KB Output is correct
6 Correct 38 ms 71020 KB Output is correct
7 Correct 37 ms 71020 KB Output is correct
8 Correct 39 ms 71148 KB Output is correct
9 Correct 37 ms 71020 KB Output is correct
10 Correct 38 ms 71020 KB Output is correct
11 Correct 38 ms 71020 KB Output is correct
12 Correct 38 ms 71020 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 71020 KB Output is correct
2 Correct 39 ms 71148 KB Output is correct
3 Correct 40 ms 71020 KB Output is correct
4 Correct 38 ms 71020 KB Output is correct
5 Correct 39 ms 71148 KB Output is correct
6 Correct 38 ms 71020 KB Output is correct
7 Correct 37 ms 71020 KB Output is correct
8 Correct 39 ms 71148 KB Output is correct
9 Correct 37 ms 71020 KB Output is correct
10 Correct 38 ms 71020 KB Output is correct
11 Correct 38 ms 71020 KB Output is correct
12 Correct 38 ms 71020 KB Output is correct
13 Correct 35 ms 71020 KB Output is correct
14 Correct 37 ms 71148 KB Output is correct
15 Correct 290 ms 71292 KB Output is correct
16 Correct 42 ms 71148 KB Output is correct
17 Correct 55 ms 71148 KB Output is correct
18 Correct 79 ms 71148 KB Output is correct
19 Correct 315 ms 71276 KB Output is correct
20 Correct 254 ms 71264 KB Output is correct
21 Correct 163 ms 71148 KB Output is correct
22 Correct 174 ms 71148 KB Output is correct
23 Correct 135 ms 71232 KB Output is correct
24 Correct 413 ms 71308 KB Output is correct
25 Correct 302 ms 71276 KB Output is correct
26 Correct 352 ms 71296 KB Output is correct
27 Correct 407 ms 71404 KB Output is correct