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Submission #144127

# Submission time Handle Problem Language Result Execution time Memory
144127 2019-08-16T07:15:11 Z Abelyan Ljetopica (COI19_ljetopica) C++17
100 / 100
 166 ms 71296 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

#define FOR(i,a) for (int i=0;i<(a);++i)
#define FORD(i,a) for (int i=(a)-1;i>=0;i--)
#define FORT(i,a,b) for (int i=(a);i<=(b);++i)
#define FORTD(i,b,a) for (int i=(b);i>=(a);--i)
#define trav(i,v) for (auto i : v)
#define all(v) v.begin(),v.end()
#define ad push_back
#define fr first
#define sc second
#define mpr(a,b) make_pair(a,b)
#define pir pair<int,int>
#define all(v) v.begin(),v.end()
#define make_unique(v) v.erase(unique(all(v)),v.end())
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define srng mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#define y1 EsiHancagorcRepa

const int N=2e3+10;
const ll MOD2=998244353;
const ll MOD=1e9+7;

ll dp[N][N][2][2][2],qan[N][N][2][2][2],P[N];
int s[N],a[N],b[N],qan0,qan1;
bool col0,col1;
char tv;


int main(){
    fastio;
    srng;
    int n,k;
    cin>>n>>k;
    n--;
    FOR(i,n){
        char c;
        cin>>c;
        if (c=='L')s[i]=0;
        else s[i]=1;

    }
    FOR(i,2*n){
        if (!i)P[i]=1;
        else P[i]=(P[i-1]*2ll)%MOD;
    }

    cin>>tv;
    if (tv==0)assert(0);
    FOR(i,n){
        char c;
        cin>>c;
        a[i]=c-'0';
        if (tv=='0')a[i]=0;
    }
    cin>>tv;
    if (tv=='0'){
        assert(0);
        cout<<0<<endl;
        return 0;
    }
    FOR(i,n){
        char c;
        cin>>c;
        b[i]=c-'0';
    }
    FOR(pla,2)FOR(plb,2)FOR(hak,2)qan[n][0][pla][plb][hak]=1;
    //cout<<n<<endl;
    FORD(i,n){
        //cout<<i<<endl;
        FOR(j,k+1){
            if (n-i<j)continue;
            //cout<<1<<endl;
            FOR(pla,2){
                FOR(plb,2){
                    FOR(hak,2){
                        if (hak)s[i]=1-s[i];
                        qan0=0;
                        qan1=0;
                        col0=true;
                        col1=true;
                        if ((pla && a[i]) || (!j && s[i])){
                            col0=false;
                        }
                        if ((plb && !b[i]) || (!j && !s[i])){
                            col1=false;
                        }
                        //cout<<pla<<" "<<plb<<" "<<i<<" "<<col0<<" "<<col1<<endl;
                        if (s[i]==0)qan1=1;
                        if (s[i]==1)qan0=1;
                        int la1=pla;
                        if (a[i]==0)la1=0;
                        int lb0=plb;
                        if (b[i]==1)lb0=0;
                        if (col0){
                            int pox=(hak+qan0)%2;
                            dp[i][j][pla][plb][hak]+=dp[i+1][j-qan0][pla][lb0][pox];
                            dp[i][j][pla][plb][hak]%=MOD;
                            qan[i][j][pla][plb][hak]+=qan[i+1][j-qan0][pla][lb0][pox];
                            qan[i][j][pla][plb][hak]%=MOD;
                        }
                        if (col1){
                            int pox=(hak+qan1)%2;
                            /*
                            if (hak && !i && pla==plb && pla){
                                cout<<la1<<endl;
                            }*/
                            dp[i][j][pla][plb][hak]+=(dp[i+1][j-qan1][la1][plb][pox]+(qan[i+1][j-qan1][la1][plb][pox]*P[n-i-1])%MOD)%MOD;
                            dp[i][j][pla][plb][hak]%=MOD;
                            qan[i][j][pla][plb][hak]+=qan[i+1][j-qan1][la1][plb][pox];
                            qan[i][j][pla][plb][hak]%=MOD;
                        }
                        if (hak)s[i]=1-s[i];
                        //if (hak)
                            //cout<<i<<" "<<pla<<" "<<plb<<" "<<dp[i][j][pla][plb][hak]<<" "<<qan[i][j][pla][plb][hak]<<" "<<col0<<" "<<col1<<endl;
                    }
                }
            }
        }
    }

    //cout<<dp[0][k][1][1]<<endl;
    dp[0][k][1][1][0]+=(qan[0][k][1][1][0]*P[n])%MOD;
    dp[0][k][1][1][0]%=MOD;
    dp[0][k][1][1][1]+=(qan[0][k][1][1][1]*P[n])%MOD;
    dp[0][k][1][1][1]%=MOD;
    //cout<<qan[0][k][1][1]<<endl;
    //assert(dp[0][k][1][1][1]>=0 && dp[0][k][1][1][0]>=0);
    cout<<(dp[0][k][1][1][1]+dp[0][k][1][1][0])%MOD<<endl;
    return 0;
}
/*
7 2 8
C 1
C 2
C 3
C 4
C 5
C 6
O 7
O 7

*/

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 8824 KB Output is correct
2 Correct 11 ms 8440 KB Output is correct
3 Correct 10 ms 8056 KB Output is correct
4 Correct 10 ms 7544 KB Output is correct
5 Correct 10 ms 7160 KB Output is correct
6 Correct 10 ms 6776 KB Output is correct
7 Correct 9 ms 6264 KB Output is correct
8 Correct 8 ms 6008 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 2 ms 632 KB Output is correct
3 Correct 2 ms 632 KB Output is correct
4 Correct 2 ms 632 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 632 KB Output is correct
7 Correct 2 ms 632 KB Output is correct
8 Correct 2 ms 632 KB Output is correct
9 Correct 2 ms 632 KB Output is correct
10 Correct 2 ms 508 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 59956 KB Output is correct
2 Correct 111 ms 48528 KB Output is correct
3 Correct 122 ms 52856 KB Output is correct
4 Correct 166 ms 71296 KB Output is correct
5 Correct 121 ms 46684 KB Output is correct
6 Correct 157 ms 71292 KB Output is correct
7 Correct 71 ms 34076 KB Output is correct
8 Correct 120 ms 52188 KB Output is correct
9 Correct 17 ms 11384 KB Output is correct
10 Correct 111 ms 49144 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 8824 KB Output is correct
2 Correct 11 ms 8440 KB Output is correct
3 Correct 10 ms 8056 KB Output is correct
4 Correct 10 ms 7544 KB Output is correct
5 Correct 10 ms 7160 KB Output is correct
6 Correct 10 ms 6776 KB Output is correct
7 Correct 9 ms 6264 KB Output is correct
8 Correct 8 ms 6008 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 2 ms 632 KB Output is correct
11 Correct 2 ms 632 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 632 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 2 ms 632 KB Output is correct
18 Correct 2 ms 508 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 632 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 140 ms 59956 KB Output is correct
25 Correct 111 ms 48528 KB Output is correct
26 Correct 122 ms 52856 KB Output is correct
27 Correct 166 ms 71296 KB Output is correct
28 Correct 121 ms 46684 KB Output is correct
29 Correct 157 ms 71292 KB Output is correct
30 Correct 71 ms 34076 KB Output is correct
31 Correct 120 ms 52188 KB Output is correct
32 Correct 17 ms 11384 KB Output is correct
33 Correct 111 ms 49144 KB Output is correct
34 Correct 139 ms 65168 KB Output is correct
35 Correct 75 ms 34116 KB Output is correct
36 Correct 106 ms 46968 KB Output is correct
37 Correct 151 ms 65016 KB Output is correct
38 Correct 40 ms 21284 KB Output is correct
39 Correct 127 ms 59612 KB Output is correct
40 Correct 36 ms 19320 KB Output is correct
41 Correct 116 ms 55388 KB Output is correct
42 Correct 135 ms 63900 KB Output is correct
43 Correct 130 ms 61308 KB Output is correct
44 Correct 124 ms 59132 KB Output is correct
45 Correct 64 ms 32248 KB Output is correct
46 Correct 120 ms 56568 KB Output is correct
47 Correct 123 ms 59000 KB Output is correct
48 Correct 96 ms 44408 KB Output is correct
49 Correct 18 ms 11000 KB Output is correct
50 Correct 139 ms 65284 KB Output is correct
51 Correct 90 ms 42332 KB Output is correct
52 Correct 92 ms 44744 KB Output is correct
53 Correct 154 ms 70904 KB Output is correct
54 Correct 70 ms 35292 KB Output is correct
55 Correct 149 ms 66576 KB Output is correct
56 Correct 148 ms 69624 KB Output is correct
57 Correct 33 ms 18680 KB Output is correct
58 Correct 135 ms 63292 KB Output is correct