oj.uz

Submission #611701

# Submission time Handle Problem Language Result Execution time Memory
611701 2022-07-29T06:43:45 Z 이동현(#8500) Ljetopica (COI19_ljetopica) C++17
100 / 100
 87 ms 63548 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

const int mod = (int)1e9 + 7;

int n, k;
string s;
int dp[1004][1004][2][2];
int cnt[1004][1004][2][2];

int sol(string f, int mst){
    f = f.substr(1);
    memset(dp, 0, sizeof(dp));
    memset(cnt, 0, sizeof(cnt));
    dp[0][0][0][0] = dp[0][0][1][0] = cnt[0][0][0][0] = cnt[0][0][1][0] = 1;
    for(int i = 0; i < n; ++i){
        for(int j = 0; j <= k; ++j){
            for(int x = 0; x < 2; ++x){
                for(int y = 0; y < 2; ++y){
                    if(!cnt[i][j][x][y] && !dp[i][j][x][y]) continue;
                    int num = ((s[i] == 'R') ^ x);
                    if(!num){
                        cnt[i + 1][j][x][y | (num < f[i] - '0')] = (cnt[i + 1][j][x][y | (num < f[i] - '0')] + (cnt[i][j][x][y])) % mod;
                        if((y || f[i] - '0' == 1) && j + 1 <= k){
                            cnt[i + 1][j + 1][x ^ 1][y] = (cnt[i + 1][j + 1][x ^ 1][y] + (cnt[i][j][x][y])) % mod;
                        }
                    }
                    else{
                        if(y || f[i] - '0' == 1){
                            cnt[i + 1][j][x][y] = (cnt[i + 1][j][x][y] + cnt[i][j][x][y]) % mod;
                        }
                        if(j + 1 <= k){
                            cnt[i + 1][j + 1][x ^ 1][y | (0 < f[i] - '0')] = (cnt[i + 1][j + 1][x ^ 1][y | (0 < f[i] - '0')] + cnt[i][j][x][y]) % mod;
                        }
                    }

                    if(!num){
                        dp[i + 1][j][x][y | (num < f[i] - '0')] = (dp[i + 1][j][x][y | (num < f[i] - '0')] + (dp[i][j][x][y] << 1)) % mod;
                        if((y || f[i] - '0' == 1) && j + 1 <= k){
                            dp[i + 1][j + 1][x ^ 1][y] = (dp[i + 1][j + 1][x ^ 1][y] + ((dp[i][j][x][y] << 1) + cnt[i][j][x][y])) % mod;
                        }
                    }
                    else{
                        if(y || f[i] - '0' == 1){
                            dp[i + 1][j][x][y] = (dp[i + 1][j][x][y] + ((dp[i][j][x][y] << 1) + cnt[i][j][x][y])) % mod;
                        }
                        if(j + 1 <= k){
                            dp[i + 1][j + 1][x ^ 1][y | (0 < f[i] - '0')] = (dp[i + 1][j + 1][x ^ 1][y | (0 < f[i] - '0')] + (dp[i][j][x][y] << 1)) % mod;
                        }
                    }
                }
            }
        }
    }
    if(mst){
        return (dp[n][k][0][1] + dp[n][k][1][1]) % mod;
    }
    return (dp[n][k][0][1] + dp[n][k][1][1] + dp[n][k][0][0] + dp[n][k][1][0]) % mod;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> k; --n;
    cin >> s;
    string a, b; cin >> a >> b;
    cout << (sol(b, 0) - sol(a, 1) + mod) % mod;
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 63344 KB Output is correct
2 Correct 33 ms 63368 KB Output is correct
3 Correct 37 ms 63348 KB Output is correct
4 Correct 32 ms 63332 KB Output is correct
5 Correct 34 ms 63420 KB Output is correct
6 Correct 31 ms 63332 KB Output is correct
7 Correct 31 ms 63444 KB Output is correct
8 Correct 33 ms 63416 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 63484 KB Output is correct
2 Correct 32 ms 63436 KB Output is correct
3 Correct 33 ms 63308 KB Output is correct
4 Correct 35 ms 63312 KB Output is correct
5 Correct 42 ms 63424 KB Output is correct
6 Correct 40 ms 63328 KB Output is correct
7 Correct 39 ms 63316 KB Output is correct
8 Correct 39 ms 63320 KB Output is correct
9 Correct 36 ms 63308 KB Output is correct
10 Correct 32 ms 63416 KB Output is correct
11 Correct 34 ms 63444 KB Output is correct
12 Correct 42 ms 63420 KB Output is correct
13 Correct 39 ms 63396 KB Output is correct
14 Correct 34 ms 63304 KB Output is correct
15 Correct 34 ms 63316 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 63468 KB Output is correct
2 Correct 54 ms 63424 KB Output is correct
3 Correct 58 ms 63428 KB Output is correct
4 Correct 87 ms 63432 KB Output is correct
5 Correct 50 ms 63324 KB Output is correct
6 Correct 76 ms 63428 KB Output is correct
7 Correct 42 ms 63372 KB Output is correct
8 Correct 52 ms 63492 KB Output is correct
9 Correct 40 ms 63424 KB Output is correct
10 Correct 49 ms 63424 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 63344 KB Output is correct
2 Correct 33 ms 63368 KB Output is correct
3 Correct 37 ms 63348 KB Output is correct
4 Correct 32 ms 63332 KB Output is correct
5 Correct 34 ms 63420 KB Output is correct
6 Correct 31 ms 63332 KB Output is correct
7 Correct 31 ms 63444 KB Output is correct
8 Correct 33 ms 63416 KB Output is correct
9 Correct 33 ms 63484 KB Output is correct
10 Correct 32 ms 63436 KB Output is correct
11 Correct 33 ms 63308 KB Output is correct
12 Correct 35 ms 63312 KB Output is correct
13 Correct 42 ms 63424 KB Output is correct
14 Correct 40 ms 63328 KB Output is correct
15 Correct 39 ms 63316 KB Output is correct
16 Correct 39 ms 63320 KB Output is correct
17 Correct 36 ms 63308 KB Output is correct
18 Correct 32 ms 63416 KB Output is correct
19 Correct 34 ms 63444 KB Output is correct
20 Correct 42 ms 63420 KB Output is correct
21 Correct 39 ms 63396 KB Output is correct
22 Correct 34 ms 63304 KB Output is correct
23 Correct 34 ms 63316 KB Output is correct
24 Correct 56 ms 63468 KB Output is correct
25 Correct 54 ms 63424 KB Output is correct
26 Correct 58 ms 63428 KB Output is correct
27 Correct 87 ms 63432 KB Output is correct
28 Correct 50 ms 63324 KB Output is correct
29 Correct 76 ms 63428 KB Output is correct
30 Correct 42 ms 63372 KB Output is correct
31 Correct 52 ms 63492 KB Output is correct
32 Correct 40 ms 63424 KB Output is correct
33 Correct 49 ms 63424 KB Output is correct
34 Correct 71 ms 63424 KB Output is correct
35 Correct 49 ms 63380 KB Output is correct
36 Correct 60 ms 63428 KB Output is correct
37 Correct 83 ms 63548 KB Output is correct
38 Correct 44 ms 63444 KB Output is correct
39 Correct 70 ms 63444 KB Output is correct
40 Correct 39 ms 63444 KB Output is correct
41 Correct 63 ms 63428 KB Output is correct
42 Correct 70 ms 63428 KB Output is correct
43 Correct 77 ms 63424 KB Output is correct
44 Correct 74 ms 63424 KB Output is correct
45 Correct 53 ms 63324 KB Output is correct
46 Correct 65 ms 63404 KB Output is correct
47 Correct 71 ms 63352 KB Output is correct
48 Correct 53 ms 63316 KB Output is correct
49 Correct 34 ms 63404 KB Output is correct
50 Correct 72 ms 63428 KB Output is correct
51 Correct 53 ms 63312 KB Output is correct
52 Correct 55 ms 63440 KB Output is correct
53 Correct 82 ms 63428 KB Output is correct
54 Correct 50 ms 63428 KB Output is correct
55 Correct 70 ms 63432 KB Output is correct
56 Correct 84 ms 63432 KB Output is correct
57 Correct 44 ms 63424 KB Output is correct
58 Correct 78 ms 63308 KB Output is correct