Submission #1288961

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288961		BlockOG	Linear Garden (IOI08_linear_garden)	C++20	100 / 100	134 ms	1688 KiB

linear_garden

#include <bits/stdc++.h>

// meeeooowwwww mrrowwww :3
// go play vivid/stasis!! now!!!! https://vividstasis.gay

#define fo(i, a, b) for (auto i = (a); i < (b); i++)
#define of(i, a, b) for (auto i = (b); i-- > (a);)
#define f first
#define s second
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define be(a) a.begin(), a.end()
using namespace std;

int ____init = []{
    ios::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
    return 0;
}();

int main() {
    int n, m; cin >> n >> m;
    string s; cin >> s;

    array<array<int, 5>, 5> ol, ne, ol2, ne2;
    fo(i, 0, 5) fo(j, 0, 5) ol[i][j] = 0, ol2[i][j] = 0;
    if (s[0] == 'L') ol2[1][3] = 1;
    else ol[1][3] = 1, ol2[0][1] = 1;

    fo(i, 1, n) {
        fo(i, 0, 5) fo(j, 0, 5) ne[i][j] = 0, ne2[i][j] = 0;

        if (s[i] == 'L') {
            ne2[0][2] += ol2[0][1], ne2[1][3] += ol2[1][2], ne2[2][1] += ol2[2][0], ne2[2][2] += ol2[2][1], ne2[3][2] += ol2[3][1], ne2[3][3] += ol2[0][2] + ol2[3][2], ne2[4][3] += ol2[4][2], ne2[4][4] += ol2[1][3] + ol2[4][3];
        } else {
            ne[0][2] += ol2[0][1], ne[1][3] += ol2[1][2], ne[2][1] += ol2[2][0], ne[2][2] += ol2[2][1], ne[3][2] += ol2[3][1], ne[3][3] += ol2[0][2] + ol2[3][2], ne[4][3] += ol2[4][2], ne[4][4] += ol2[1][3] + ol2[4][3];
            ne2[0][1] += ol2[0][2], ne2[1][2] += ol2[1][3], ne2[2][0] += ol2[0][1] + ol2[2][1], ne2[2][1] += ol2[2][2], ne2[3][1] += ol2[1][2] + ol2[3][2], ne2[3][2] += ol2[3][3], ne2[4][2] += ol2[4][3], ne2[4][3] += ol2[4][4];
        }

        ne[0][2] += ol[0][1], ne[1][3] += ol[1][2], ne[2][1] += ol[2][0], ne[2][2] += ol[2][1], ne[3][2] += ol[3][1], ne[3][3] += ol[0][2] + ol[3][2], ne[4][3] += ol[4][2], ne[4][4] += ol[1][3] + ol[4][3];
        ne[0][1] += ol[0][2], ne[1][2] += ol[1][3], ne[2][0] += ol[0][1] + ol[2][1], ne[2][1] += ol[2][2], ne[3][1] += ol[1][2] + ol[3][2], ne[3][2] += ol[3][3], ne[4][2] += ol[4][3], ne[4][3] += ol[4][4];

        fo(i, 0, 5) fo(j, 0, 5) ne[i][j] = ne[i][j] % m, ne2[i][j] = ne2[i][j] % m;
        swap(ol, ne), swap(ol2, ne2);
    }

    int res = 1;
    fo(i, 0, 5) fo(j, 0, 5) res = (res + ol[i][j]) % m;
    cout << res << endl;
}

• Subtask 1: 2 / 2
• Subtask 2: 2 / 2
• Subtask 3: 4 / 4
• Subtask 4: 4 / 4
• Subtask 5: 4 / 4
• Subtask 6: 4 / 4
• Subtask 7: 4 / 4
• Subtask 8: 4 / 4
• Subtask 9: 4 / 4
• Subtask 10: 4 / 4
• Subtask 11: 4 / 4
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 5 / 5
• Subtask 19: 5 / 5
• Subtask 20: 5 / 5
• Subtask 21: 5 / 5
• Subtask 22: 5 / 5
• Subtask 23: 5 / 5