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Submission #702125

# Submission time Handle Problem Language Result Execution time Memory
702125 2023-02-23T04:24:10 Z bin9638 Ljetopica (COI19_ljetopica) C++17
100 / 100
 40 ms 32332 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define N  1010
#define fs first
#define sc second
#define ii pair<int,int>
#define iii pair<ii,int>
#define ld long double
#define pb push_back
#define int ll

const ll mod=1e9+7;

int mu2[N],n,k,a[N];
vector<int>l,r,dq;
ii dp[N][N][2];

void selfadd(int&u,int v)
{
    u=(u+v)%mod;
}

ii get(int pos,int k,int id,int dabe)
{
    if(pos==0)
        return{0,(k==0)};
    if(dabe&&dp[pos][k][id].fs!=-1)
        return dp[pos][k][id];
    ii res={0,0};
   // cout<<pos<<" "<<k<<" "<<id<<endl;
    //ko doi
    int i=(id^a[pos]);
    if(dabe||i<=dq[pos-1])
    {
        ii cc=get(pos-1,k,id,(dabe|(i<dq[pos-1])));
        selfadd(res.fs,cc.fs+cc.sc*mu2[pos-1]*i);
        selfadd(res.sc,cc.sc);
    }
    if(k>0)
    {
        i=((id^a[pos])^1);
        if(dabe||i<=dq[pos-1])
        {
            ii cc=get(pos-1,k-1,(id^1),(dabe|(i<dq[pos-1])));
            selfadd(res.fs,cc.fs+cc.sc*mu2[pos-1]*i);
            selfadd(res.sc,cc.sc);
        }
    }
    if(dabe)
        dp[pos][k][id]=res;
    return res;
}

int solve(vector<int>s)
{
    //for(int i=n-1;i>=0;i--)cout<<s[i]<<" ";
    if(s[n-1]==0)
        return 0;
    dq=s;
    ii A=get(n-1,k,0,0),B=get(n-1,k,1,0);
    selfadd(A.fs,B.fs);
    selfadd(A.sc,B.sc);
    return(A.fs+A.sc*mu2[n-1])%mod;
}

int32_t main()
{
   // freopen("A.inp","r",stdin);
   // freopen("A.out","w",stdout);
    cin.tie(NULL);
    cout.tie(NULL);
    ios::sync_with_stdio(0);
    cin>>n>>k;
    for(int i=n-1;i>=1;i--)
    {
        char ch;
        cin>>ch;
        a[i]=(ch=='R');
    }
    mu2[0]=1;
    for(int i=1;i<=n;i++)
        mu2[i]=mu2[i-1]*2%mod;
    l.resize(n+1,0);
    r.resize(n+1,0);
    for(int i=n-1;i>=0;i--)
    {
        char ch;
        cin>>ch;
        l[i]=ch-'0';
     //   cin>>l[i];
    }
    for(int i=n-1;i>=0;i--)
    {
        char ch;
        cin>>ch;
        r[i]=ch-'0';
    }
    for(int i=0;i<=1005;i++)
        for(int j=0;j<=1005;j++)
            dp[i][j][0]=dp[i][j][1]={-1,-1};
    int res=solve(r);
    for(int i=0;i<=n-1;i++)
        if(l[i]==1)
        {
            l[i]=0;
            for(int j=0;j<i;j++)
                l[j]=1;
            break;
        }
    cout<<(res-solve(l)+mod*mod)%mod;
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 32204 KB Output is correct
2 Correct 13 ms 32216 KB Output is correct
3 Correct 12 ms 32212 KB Output is correct
4 Correct 12 ms 32208 KB Output is correct
5 Correct 12 ms 32176 KB Output is correct
6 Correct 12 ms 32212 KB Output is correct
7 Correct 13 ms 32216 KB Output is correct
8 Correct 15 ms 32212 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 32084 KB Output is correct
2 Correct 15 ms 32024 KB Output is correct
3 Correct 12 ms 32084 KB Output is correct
4 Correct 13 ms 32084 KB Output is correct
5 Correct 13 ms 32120 KB Output is correct
6 Correct 13 ms 32084 KB Output is correct
7 Correct 13 ms 32120 KB Output is correct
8 Correct 13 ms 32084 KB Output is correct
9 Correct 14 ms 32084 KB Output is correct
10 Correct 13 ms 32088 KB Output is correct
11 Correct 13 ms 32084 KB Output is correct
12 Correct 13 ms 32112 KB Output is correct
13 Correct 14 ms 32140 KB Output is correct
14 Correct 13 ms 32120 KB Output is correct
15 Correct 16 ms 32084 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 32332 KB Output is correct
2 Correct 25 ms 32284 KB Output is correct
3 Correct 26 ms 32208 KB Output is correct
4 Correct 32 ms 32280 KB Output is correct
5 Correct 24 ms 32188 KB Output is correct
6 Correct 32 ms 32220 KB Output is correct
7 Correct 20 ms 32212 KB Output is correct
8 Correct 26 ms 32284 KB Output is correct
9 Correct 20 ms 32240 KB Output is correct
10 Correct 27 ms 32252 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 32204 KB Output is correct
2 Correct 13 ms 32216 KB Output is correct
3 Correct 12 ms 32212 KB Output is correct
4 Correct 12 ms 32208 KB Output is correct
5 Correct 12 ms 32176 KB Output is correct
6 Correct 12 ms 32212 KB Output is correct
7 Correct 13 ms 32216 KB Output is correct
8 Correct 15 ms 32212 KB Output is correct
9 Correct 12 ms 32084 KB Output is correct
10 Correct 15 ms 32024 KB Output is correct
11 Correct 12 ms 32084 KB Output is correct
12 Correct 13 ms 32084 KB Output is correct
13 Correct 13 ms 32120 KB Output is correct
14 Correct 13 ms 32084 KB Output is correct
15 Correct 13 ms 32120 KB Output is correct
16 Correct 13 ms 32084 KB Output is correct
17 Correct 14 ms 32084 KB Output is correct
18 Correct 13 ms 32088 KB Output is correct
19 Correct 13 ms 32084 KB Output is correct
20 Correct 13 ms 32112 KB Output is correct
21 Correct 14 ms 32140 KB Output is correct
22 Correct 13 ms 32120 KB Output is correct
23 Correct 16 ms 32084 KB Output is correct
24 Correct 35 ms 32332 KB Output is correct
25 Correct 25 ms 32284 KB Output is correct
26 Correct 26 ms 32208 KB Output is correct
27 Correct 32 ms 32280 KB Output is correct
28 Correct 24 ms 32188 KB Output is correct
29 Correct 32 ms 32220 KB Output is correct
30 Correct 20 ms 32212 KB Output is correct
31 Correct 26 ms 32284 KB Output is correct
32 Correct 20 ms 32240 KB Output is correct
33 Correct 27 ms 32252 KB Output is correct
34 Correct 29 ms 32212 KB Output is correct
35 Correct 24 ms 32272 KB Output is correct
36 Correct 26 ms 32240 KB Output is correct
37 Correct 32 ms 32204 KB Output is correct
38 Correct 19 ms 32164 KB Output is correct
39 Correct 28 ms 32212 KB Output is correct
40 Correct 18 ms 32272 KB Output is correct
41 Correct 28 ms 32232 KB Output is correct
42 Correct 29 ms 32156 KB Output is correct
43 Correct 30 ms 32204 KB Output is correct
44 Correct 40 ms 32240 KB Output is correct
45 Correct 21 ms 32272 KB Output is correct
46 Correct 37 ms 32268 KB Output is correct
47 Correct 28 ms 32212 KB Output is correct
48 Correct 23 ms 32212 KB Output is correct
49 Correct 14 ms 32188 KB Output is correct
50 Correct 29 ms 32212 KB Output is correct
51 Correct 24 ms 32276 KB Output is correct
52 Correct 24 ms 32212 KB Output is correct
53 Correct 35 ms 32212 KB Output is correct
54 Correct 22 ms 32256 KB Output is correct
55 Correct 31 ms 32212 KB Output is correct
56 Correct 31 ms 32212 KB Output is correct
57 Correct 19 ms 32204 KB Output is correct
58 Correct 39 ms 32268 KB Output is correct