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Submission #313876

# Submission time Handle Problem Language Result Execution time Memory
313876 2020-10-17T08:08:38 Z MKopchev Lucky Numbers (RMI19_lucky) C++14
100 / 100
 85 ms 4992 KB 
#include<bits/stdc++.h>
using namespace std;

const int nmax=1e5+42,mod=1e9+7;

int n,q;

int inp[nmax];

int LHS,RHS;

int dp[nmax][10];//digits, first digit

int query(int l,int r)
{
    LHS=l;
    RHS=r;

    int ret=0,prv=0;

    for(int i=LHS;i<=RHS;i++)
    {
        for(int cur=0;cur<inp[i];cur++)
            if(prv==1&&cur==3)continue;
            else
            {
                ret=(ret+dp[RHS-i][cur])%mod;
            }

        if(prv==1&&inp[i]==3)break;

        prv=inp[i];

        if(i==RHS)ret=(ret+1)%mod;
    }

    return ret;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie();
    cout.tie();

    cin>>n>>q;

    for(int i=0;i<=9;i++)
    {
        dp[0][i]=1;
    }

    for(int pos=1;pos<=n;pos++)
    {
        for(int frst=0;frst<=9;frst++)
        {
            for(int prv=0;prv<=9;prv++)
                if(frst==1&&prv==3)continue;
                else
                {
                    dp[pos][frst]=(dp[pos][frst]+dp[pos-1][prv])%mod;
                }
            //cout<<pos<<" "<<frst<<" -> "<<dp[pos][frst]<<endl;
        }
    }


    for(int i=1;i<=n;i++)
    {
        char c;
        cin>>c;
        inp[i]=c-'0';
    }

    cout<<query(1,n)<<"\n";

    for(int i=1;i<=q;i++)
    {
        int type;
        cin>>type;

        if(type==2)
        {
            int pos,val;
            cin>>pos>>val;

            inp[pos]=val;
        }
        else
        {
            int l,r;
            cin>>l>>r;

            cout<<query(l,r)<<"\n";
        }
    }
    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 896 KB Output is correct
2 Correct 50 ms 1012 KB Output is correct

Subtask #4
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 896 KB Output is correct
2 Correct 50 ms 1012 KB Output is correct
3 Correct 67 ms 4344 KB Output is correct
4 Correct 66 ms 4088 KB Output is correct
5 Correct 75 ms 4472 KB Output is correct
6 Correct 81 ms 4984 KB Output is correct
7 Correct 85 ms 4992 KB Output is correct

Subtask #5
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 37 ms 896 KB Output is correct
8 Correct 50 ms 1012 KB Output is correct
9 Correct 20 ms 896 KB Output is correct
10 Correct 28 ms 896 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 37 ms 896 KB Output is correct
8 Correct 50 ms 1012 KB Output is correct
9 Correct 67 ms 4344 KB Output is correct
10 Correct 66 ms 4088 KB Output is correct
11 Correct 75 ms 4472 KB Output is correct
12 Correct 81 ms 4984 KB Output is correct
13 Correct 85 ms 4992 KB Output is correct
14 Correct 20 ms 896 KB Output is correct
15 Correct 28 ms 896 KB Output is correct
16 Correct 49 ms 3960 KB Output is correct
17 Correct 48 ms 3960 KB Output is correct
18 Correct 55 ms 4472 KB Output is correct
19 Correct 61 ms 4856 KB Output is correct
20 Correct 62 ms 4856 KB Output is correct