oj.uz

Submission #975466

# Submission time Handle Problem Language Result Execution time Memory
975466 2024-05-05T08:43:21 Z Kenjikrab Boat (APIO16_boat) C++14
58 / 100
 2000 ms 8720 KB 
#include<bits/stdc++.h>
#define int long long
#define pii pair<int,int>
#define fi first
#define se second
using namespace std;
int const mod=1e9+7;
map<int,int> ind;
vector<int> val;
vector<int> fen(1010,0);
void upd(int idx,int val)
{
    idx+=2;
    for(int i=idx;i<1010;i+=i&-i)fen[i]+=val,fen[i]%=mod;
}
int qr(int idx)
{
    idx+=2;
    int ret=0;
    for(int i=idx;i>0;i-=i&-i)ret+=fen[i],ret%=mod;
    return ret;
}

int pow(int a,int b)
{
    if(b==0)return 1;
    if(b==1)return a;
    int ret=pow(a,b/2);
    if(b%2==0)return (ret*ret)%mod;
    else return (((ret*ret)%mod)*a)%mod;
}
vector<int> inverse(510);
void inv(int a)
{
    inverse[a]=pow(a,mod-2);
}
int invfac[1010];
int choose(int a,int b)
{
    if(b>a)return 0;
    if(a==b)return 1;
    if(a-b>b)b=a-b;
    int ret=1;
    for(int i=b+1;i<=a;i++)
    {
        ret*=i;
        ret%=mod;
    }
    ret*=invfac[a-b];
    ret%=mod;
    return ret;
}

signed main()
{
    cin.tie(nullptr)->sync_with_stdio(false);
    for(int i=2;i<510;i++)inv(i);
    invfac[0]=1;
    invfac[1]=1;
    for(int i=2;i<510;i++)invfac[i]=invfac[i-1]*inverse[i],invfac[i]%=mod;
    int n;
    cin>>n;
    vector<pii> info;
    set<int> temp;
    for(int i=0;i<n;i++)
    {
        int a,b;
        cin>>a>>b;
        temp.insert(a);
        temp.insert(b+1);
        info.push_back({a,b+1});
    }
    for(auto it:temp)
    {
        val.push_back(it);
        ind[it]=val.size()-1;
    }
    vector<vector<int>> pre(510,vector<int>(1010,-2));
    vector<int> latest(1010,-1);
    upd(-1,1);
    vector<vector<int>> dp(510,vector<int>(1010,0));
    for(int i=0;i<n;i++)
    {
        //cout<<endl<<i<<":";
        for(int j=ind[info[i].se]-1;j>=ind[info[i].fi];j--)
        {
            //cout<<j<<" ";
            
            int bef=latest[j];
            pre[i][j]=latest[j];
            latest[j]=i;
            int a=qr(j),b=(val[j+1]-val[j]),c=0;
            dp[i][j]=a;
            int ans=a*b;
            ans%=mod;
            int k=2;
            //cout<<i<<" "<<j<<" "<<ans<<" ";
            while(bef!=-1)
            {
                ans+=dp[bef][j]*choose(b+k-2,k);
                ans%=mod;
                bef=pre[bef][j];
                k++;
                //cout<<endl<<bef<<" "<<ans<<" ";
            }
           // cout<<endl;
            upd(j+1,ans);
        }
    }
    cout<<(qr(1007)+mod-1)%mod;
    return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:92:45: warning: unused variable 'c' [-Wunused-variable]
   92 |             int a=qr(j),b=(val[j+1]-val[j]),c=0;
      |                                             ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8540 KB Output is correct
2 Correct 4 ms 8540 KB Output is correct
3 Correct 4 ms 8540 KB Output is correct
4 Correct 4 ms 8540 KB Output is correct
5 Correct 3 ms 8540 KB Output is correct
6 Correct 4 ms 8540 KB Output is correct
7 Correct 4 ms 8540 KB Output is correct
8 Correct 4 ms 8540 KB Output is correct
9 Correct 4 ms 8540 KB Output is correct
10 Correct 4 ms 8540 KB Output is correct
11 Correct 3 ms 8540 KB Output is correct
12 Correct 4 ms 8540 KB Output is correct
13 Correct 4 ms 8568 KB Output is correct
14 Correct 4 ms 8540 KB Output is correct
15 Correct 4 ms 8540 KB Output is correct
16 Correct 4 ms 8540 KB Output is correct
17 Correct 4 ms 8540 KB Output is correct
18 Correct 4 ms 8540 KB Output is correct
19 Correct 4 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8540 KB Output is correct
2 Correct 4 ms 8540 KB Output is correct
3 Correct 4 ms 8540 KB Output is correct
4 Correct 4 ms 8540 KB Output is correct
5 Correct 3 ms 8540 KB Output is correct
6 Correct 4 ms 8540 KB Output is correct
7 Correct 4 ms 8540 KB Output is correct
8 Correct 4 ms 8540 KB Output is correct
9 Correct 4 ms 8540 KB Output is correct
10 Correct 4 ms 8540 KB Output is correct
11 Correct 3 ms 8540 KB Output is correct
12 Correct 4 ms 8540 KB Output is correct
13 Correct 4 ms 8568 KB Output is correct
14 Correct 4 ms 8540 KB Output is correct
15 Correct 4 ms 8540 KB Output is correct
16 Correct 4 ms 8540 KB Output is correct
17 Correct 4 ms 8540 KB Output is correct
18 Correct 4 ms 8540 KB Output is correct
19 Correct 4 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 261 ms 8536 KB Output is correct
22 Correct 261 ms 8536 KB Output is correct
23 Correct 220 ms 8692 KB Output is correct
24 Correct 271 ms 8688 KB Output is correct
25 Correct 269 ms 8540 KB Output is correct
26 Correct 424 ms 8688 KB Output is correct
27 Correct 425 ms 8684 KB Output is correct
28 Correct 430 ms 8692 KB Output is correct
29 Correct 444 ms 8680 KB Output is correct
30 Correct 5 ms 8540 KB Output is correct
31 Correct 4 ms 8720 KB Output is correct
32 Correct 4 ms 8540 KB Output is correct
33 Correct 4 ms 8540 KB Output is correct
34 Correct 4 ms 8540 KB Output is correct
35 Correct 4 ms 8704 KB Output is correct
36 Correct 4 ms 8540 KB Output is correct
37 Correct 4 ms 8540 KB Output is correct
38 Correct 4 ms 8540 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 8540 KB Output is correct
2 Correct 8 ms 8620 KB Output is correct
3 Correct 11 ms 8540 KB Output is correct
4 Correct 11 ms 8512 KB Output is correct
5 Correct 13 ms 8620 KB Output is correct
6 Correct 37 ms 8624 KB Output is correct
7 Correct 37 ms 8540 KB Output is correct
8 Correct 37 ms 8536 KB Output is correct
9 Correct 37 ms 8540 KB Output is correct
10 Correct 37 ms 8536 KB Output is correct
11 Correct 14 ms 8540 KB Output is correct
12 Correct 8 ms 8620 KB Output is correct
13 Correct 11 ms 8616 KB Output is correct
14 Correct 11 ms 8540 KB Output is correct
15 Correct 15 ms 8540 KB Output is correct
16 Correct 7 ms 8540 KB Output is correct
17 Correct 6 ms 8608 KB Output is correct
18 Correct 7 ms 8540 KB Output is correct
19 Correct 6 ms 8604 KB Output is correct
20 Correct 8 ms 8536 KB Output is correct

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8540 KB Output is correct
2 Correct 4 ms 8540 KB Output is correct
3 Correct 4 ms 8540 KB Output is correct
4 Correct 4 ms 8540 KB Output is correct
5 Correct 3 ms 8540 KB Output is correct
6 Correct 4 ms 8540 KB Output is correct
7 Correct 4 ms 8540 KB Output is correct
8 Correct 4 ms 8540 KB Output is correct
9 Correct 4 ms 8540 KB Output is correct
10 Correct 4 ms 8540 KB Output is correct
11 Correct 3 ms 8540 KB Output is correct
12 Correct 4 ms 8540 KB Output is correct
13 Correct 4 ms 8568 KB Output is correct
14 Correct 4 ms 8540 KB Output is correct
15 Correct 4 ms 8540 KB Output is correct
16 Correct 4 ms 8540 KB Output is correct
17 Correct 4 ms 8540 KB Output is correct
18 Correct 4 ms 8540 KB Output is correct
19 Correct 4 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 261 ms 8536 KB Output is correct
22 Correct 261 ms 8536 KB Output is correct
23 Correct 220 ms 8692 KB Output is correct
24 Correct 271 ms 8688 KB Output is correct
25 Correct 269 ms 8540 KB Output is correct
26 Correct 424 ms 8688 KB Output is correct
27 Correct 425 ms 8684 KB Output is correct
28 Correct 430 ms 8692 KB Output is correct
29 Correct 444 ms 8680 KB Output is correct
30 Correct 5 ms 8540 KB Output is correct
31 Correct 4 ms 8720 KB Output is correct
32 Correct 4 ms 8540 KB Output is correct
33 Correct 4 ms 8540 KB Output is correct
34 Correct 4 ms 8540 KB Output is correct
35 Correct 4 ms 8704 KB Output is correct
36 Correct 4 ms 8540 KB Output is correct
37 Correct 4 ms 8540 KB Output is correct
38 Correct 4 ms 8540 KB Output is correct
39 Correct 11 ms 8540 KB Output is correct
40 Correct 8 ms 8620 KB Output is correct
41 Correct 11 ms 8540 KB Output is correct
42 Correct 11 ms 8512 KB Output is correct
43 Correct 13 ms 8620 KB Output is correct
44 Correct 37 ms 8624 KB Output is correct
45 Correct 37 ms 8540 KB Output is correct
46 Correct 37 ms 8536 KB Output is correct
47 Correct 37 ms 8540 KB Output is correct
48 Correct 37 ms 8536 KB Output is correct
49 Correct 14 ms 8540 KB Output is correct
50 Correct 8 ms 8620 KB Output is correct
51 Correct 11 ms 8616 KB Output is correct
52 Correct 11 ms 8540 KB Output is correct
53 Correct 15 ms 8540 KB Output is correct
54 Correct 7 ms 8540 KB Output is correct
55 Correct 6 ms 8608 KB Output is correct
56 Correct 7 ms 8540 KB Output is correct
57 Correct 6 ms 8604 KB Output is correct
58 Correct 8 ms 8536 KB Output is correct
59 Execution timed out 2033 ms 8540 KB Time limit exceeded
60 Halted 0 ms 0 KB -