oj.uz

답안 #681599

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
681599 2023-01-13T12:33:01 Z vjudge1 Skyscraper (JOI16_skyscraper) C++14
20 / 100
 2000 ms 1332 KB 
#include <iostream>
#include <algorithm>
using namespace std;
const int N = 100 +5;
const int M = 1000 +5;
const int mod = 1e9+7;
typedef pair<int,int> pii;

inline int add(int x, int y)
{
    return (x+y>=mod ? x+y-mod : x+y);
}

inline int sub(int x, int y)
{
    return (x-y<0 ? x-y+mod : x-y);
}

inline int gun(int x, int y)
{
    return ((x*1ll*y)%mod);
}

int n,l;
int a[N];
int dp[N][M][M][3];
bool vis[N][M][M][3];

int solve(int idx, int comps, int sum, int matha)
{
    if(sum > l)
        return 0;
    if(comps < 0 || comps >n)
        return 0;
    if(comps == 0 && idx>0)
        return 0;
    if(matha > 2)
        return 0;
    if(idx==n)
    {
        if(comps == 1 && matha == 2)
            return 1;
        return 0;
    }
    int &ret = dp[idx][comps][sum][matha];
    if(vis[idx][comps][sum][matha])
        return ret;
    int prv = (idx-1>=0?a[idx-1] : 0);
    int notun = sum + (a[idx]-prv)*(2*comps - matha);
    int ans = 0;
    //Create
    ans = add(ans, gun(comps+1 - matha, solve(idx+1, comps+1, notun, matha)));
    //merge
    if(comps >= 2)
        ans = add(ans, gun(comps-1, solve(idx+1, comps-1, notun, matha)) );
    //add
    if(comps>=1)
        ans = add(ans, gun(2*comps-matha, solve(idx+1, comps, notun, matha)));
    //notun matha
    ans = add(ans, gun(2-matha, solve(idx+1, comps+1, notun, matha+1)));
    //mathay lagao
    ans = add(ans, gun(2-matha, solve(idx+1, comps, notun, matha+1)));
    return ret = ans;
}
int32_t main()
{

    cin>>n>>l;
    for(int i=0; i<n; i++)
    {
        cin>>a[i];
    }
    sort(a,a+n);
    if(n==1)
    {
        cout<<"1\n";
        return 0;
    }
    cout<<solve(0,0,0,0)<<"\n";
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 576 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 444 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 692 KB Output is correct
2 Correct 4 ms 596 KB Output is correct
3 Correct 79 ms 796 KB Output is correct
4 Correct 4 ms 596 KB Output is correct
5 Correct 4 ms 596 KB Output is correct
6 Correct 23 ms 716 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 68 ms 664 KB Output is correct
9 Correct 177 ms 696 KB Output is correct
10 Correct 5 ms 596 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 576 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 444 KB Output is correct
11 Correct 31 ms 692 KB Output is correct
12 Correct 4 ms 596 KB Output is correct
13 Correct 79 ms 796 KB Output is correct
14 Correct 4 ms 596 KB Output is correct
15 Correct 4 ms 596 KB Output is correct
16 Correct 23 ms 716 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 68 ms 664 KB Output is correct
19 Correct 177 ms 696 KB Output is correct
20 Correct 5 ms 596 KB Output is correct
21 Execution timed out 2083 ms 1332 KB Time limit exceeded
22 Halted 0 ms 0 KB -