oj.uz

답안 #880747

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
880747 2023-11-30T01:22:04 Z cpptowin Tents (JOI18_tents) C++17
48 / 100
 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);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# 결과 실행 시간 메모리 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

Subtask #2
0 / 52.0

# 결과 실행 시간 메모리 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 -