| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 880747 |
2023-11-30T01:22:04 Z |
cpptowin |
Tents (JOI18_tents) |
C++17 |
|
71 ms |
144688 KB |
#include<bits/stdc++.h>
#define fo(i,d,c) for(int i=d;i<=c;i++)
#define fod(i,c,d) for(int i=c;i>=d;i--)
#define maxn 1000010
#define N 3010
#define fi first
#define se second
#define pb emplace_back
#define en cout<<"\n";
#define int long long
#define inf 1000000000
#define pii pair<int,int>
#define vii vector<pii>
#define lb(x) x&-x
#define bit(i,j) ((i>>j)&1)
#define offbit(i,j) (i^(1<<j))
#define onbit(i,j) (i|(1<<j))
#define vi vector<int>
template <typename T1, typename T2> bool minimize(T1 &a, T2 b){if (a > b) {a = b; return true;} return false;}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b){if (a < b) {a = b; return true;} return false;}
using namespace std;
const int mod = 1e9 + 7;
int dp[N][N];
int DP(int n,int m,bool ok)
{
if(dp[n][m] != -1) return dp[n][m];
int &now = dp[n][m];
if(n < 1 or m < 1) {
now = ok;
return now;
}
now = 0;
now = (now + DP(n - 1,m,ok)) % mod;
now = (now + 4 * m * DP(n - 1,m - 1,1)) % mod;
now = (now + m * (m - 1) / 2 * DP(n - 1,m - 2,1)) % mod;
now = (now + m * (n - 1) * DP(n - 2,m - 1,1)) % mod;
return now;
}
int n,m;
main()
{
#define name "TASK"
if(fopen(name".inp","r"))
{
freopen(name".inp","r",stdin);
freopen(name".out","w",stdout);
}
ios_base::sync_with_stdio(false);cin.tie(NULL);
cin >> n >> m;
memset(dp,-1,sizeof dp);
// dp[0][0] = 1;
cout << DP(n,m,0);
}
Compilation message
tents.cpp:40:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
40 | main()
| ^~~~
tents.cpp: In function 'int main()':
tents.cpp:45:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
45 | freopen(name".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
tents.cpp:46:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
46 | freopen(name".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 2 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 3 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 4 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 5 |
Correct |
10 ms |
71260 KB |
Output is correct |
| 6 |
Correct |
9 ms |
71156 KB |
Output is correct |
| 7 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 8 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 9 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 10 |
Correct |
10 ms |
71260 KB |
Output is correct |
| 11 |
Correct |
9 ms |
71340 KB |
Output is correct |
| 12 |
Correct |
11 ms |
71260 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 2 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 3 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 4 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 5 |
Correct |
10 ms |
71260 KB |
Output is correct |
| 6 |
Correct |
9 ms |
71156 KB |
Output is correct |
| 7 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 8 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 9 |
Correct |
9 ms |
71260 KB |
Output is correct |
| 10 |
Correct |
10 ms |
71260 KB |
Output is correct |
| 11 |
Correct |
9 ms |
71340 KB |
Output is correct |
| 12 |
Correct |
11 ms |
71260 KB |
Output is correct |
| 13 |
Correct |
9 ms |
71340 KB |
Output is correct |
| 14 |
Correct |
9 ms |
71516 KB |
Output is correct |
| 15 |
Runtime error |
71 ms |
144688 KB |
Execution killed with signal 11 |
| 16 |
Halted |
0 ms |
0 KB |
- |
