Submission #236095

#	Time	Username	Problem	Language	Result	Execution time	Memory
236095		NONAME	Retro (COCI17_retro)	C++17	49 / 100	142 ms	106104 KiB

retro

#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define sz(x) int(x.size())
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
#define N 100500
#define oo ll(1e16)
#define ft first
#define sd second
#define pb push_back
#define ppb pop_back
#define el '\n'
#define elf endl
#define base ll(1e9 + 7)
using namespace std;

typedef long long ll;
typedef long double ld;

int n, m, f[300][300][300];
string s[300];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m;
    for (int i = 0; i < n; i++)
		cin >> s[i];

	for (int i = 0; i < n - i - 1; i++)
		swap(s[i], s[n - i - 1]);

	for (int i = 0; i < n; i++)
	for (int j = 0; j < m; j++)
	for (int k = 0; k < n; k++)
		f[i][j][k] = -1;

	for (int i = 0; i < m; i++)
		if (s[0][i] == 'M')
			f[0][i][0] = 0;

    if (n <= 100) {
		string fs[n][m][n];

		for (int i = 0; i < m; i++)
			if (s[0][i] == 'M')
				fs[0][i][0] = "";

		for (int i = 0; i < n - 1; i++)
		for (int j = 0; j < m; j++) {
			if (s[i][j] == '*')
				continue;

			if (j - 1 >= 0 && s[i + 1][j - 1] != '*') {
				if (s[i + 1][j - 1] == '.') {
					for (int k = 0; k < n; k++)
						if (f[i][j][k] != -1) {
							if (f[i][j][k] > f[i + 1][j - 1][k]) {
								f[i + 1][j - 1][k] = f[i][j][k];
								fs[i + 1][j - 1][k] = fs[i][j][k];
							} else if (f[i][j][k] == f[i + 1][j - 1][k]) {
								fs[i + 1][j - 1][k] = min(fs[i + 1][j - 1][k], fs[i][j][k]);
							}
						}
				} else {
					if (s[i + 1][j - 1] == '(') {
						for (int k = 0; k < n - 1; k++)
							if (f[i][j][k] != -1) {
								if (f[i][j][k] + 1 > f[i + 1][j - 1][k + 1]) {
									f[i + 1][j - 1][k + 1] = f[i][j][k] + 1;
									fs[i + 1][j - 1][k + 1] = fs[i][j][k] + '(';
								} else if (f[i][j][k] + 1 == f[i + 1][j - 1][k + 1]) {
									fs[i + 1][j - 1][k + 1] = min(fs[i + 1][j - 1][k + 1], fs[i][j][k] + '(');
								}
							}
					} else {
						for (int k = 1; k < n; k++)
							if (f[i][j][k] != -1) {
								if (f[i][j][k] + 1 > f[i + 1][j - 1][k - 1]) {
									f[i + 1][j - 1][k - 1] = f[i][j][k] + 1;
									fs[i + 1][j - 1][k - 1] = fs[i][j][k] + ')';
								} else if (f[i][j][k] + 1 == f[i + 1][j - 1][k - 1]) {
									fs[i + 1][j - 1][k - 1] = min(fs[i + 1][j - 1][k - 1], fs[i][j][k] + ')');
								}
							}
					}
				}
			}
			if (s[i + 1][j] != '*') {
				if (s[i + 1][j] == '.') {
					for (int k = 0; k < n; k++)
						if (f[i][j][k] != -1) {
							if (f[i][j][k] > f[i + 1][j][k]) {
								f[i + 1][j][k] = f[i][j][k];
								fs[i + 1][j][k] = fs[i][j][k];
							} else if (f[i][j][k] == f[i + 1][j][k]) {
								fs[i + 1][j][k] = min(fs[i + 1][j][k], fs[i][j][k]);
							}
						}
				} else {
					if (s[i + 1][j] == '(') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1) {
								if (f[i][j][k] + 1 > f[i + 1][j][k + 1]) {
									f[i + 1][j][k + 1] = f[i][j][k] + 1;
									fs[i + 1][j][k + 1] = fs[i][j][k] + '(';
								} else if (f[i][j][k] + 1 == f[i + 1][j][k + 1]) {
									fs[i + 1][j][k + 1] = min(fs[i + 1][j][k + 1], fs[i][j][k] + '(');
								}
							}
					} else {
						for (int k = 1; k < n; k++)
							if (f[i][j][k] != -1) {
								if (f[i][j][k] + 1 > f[i + 1][j][k - 1]) {
									f[i + 1][j][k - 1] = f[i][j][k] + 1;
									fs[i + 1][j][k - 1] = fs[i][j][k] + ')';
								} else if (f[i][j][k] + 1 == f[i + 1][j][k - 1]) {
									fs[i + 1][j][k - 1] = min(fs[i + 1][j][k - 1], fs[i][j][k] + ')');
								}
							}
					}
				}
			}
			if (j + 1 < m && s[i + 1][j + 1] != '*') {
				if (s[i + 1][j + 1] == '.') {
					for (int k = 0; k < n; k++)
						if (f[i][j][k] != -1) {
							if (f[i][j][k] > f[i + 1][j + 1][k]) {
								f[i + 1][j + 1][k] = f[i][j][k];
								fs[i + 1][j + 1][k] = fs[i][j][k];
							} else if (f[i][j][k] == f[i + 1][j + 1][k]) {
								fs[i + 1][j + 1][k] = min(fs[i + 1][j + 1][k], fs[i][j][k]);
							}
						}
				} else {
					if (s[i + 1][j + 1] == '(') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1) {
								if (f[i][j][k] + 1 > f[i + 1][j + 1][k + 1]) {
									f[i + 1][j + 1][k + 1] = f[i][j][k] + 1;
									fs[i + 1][j + 1][k + 1] = fs[i][j][k] + '(';
								} else if (f[i][j][k] + 1 == f[i + 1][j + 1][k + 1]) {
									fs[i + 1][j + 1][k + 1] = min(fs[i + 1][j + 1][k + 1], fs[i][j][k] + '(');
								}
							}
					} else {
						for (int k = 1; k < n; k++)
							if (f[i][j][k] != -1) {
								if (f[i][j][k] + 1 > f[i + 1][j + 1][k - 1]) {
									f[i + 1][j + 1][k - 1] = f[i][j][k] + 1;
									fs[i + 1][j + 1][k - 1] = fs[i][j][k] + ')';
								} else if (f[i][j][k] + 1 == f[i + 1][j + 1][k - 1]) {
									fs[i + 1][j + 1][k - 1] = min(fs[i + 1][j + 1][k - 1], fs[i][j][k] + ')');
								}
							}
					}
				}
			}
		}

		int x = 0, y = 0;
		for (int i = 0; i < n; i++)
		for (int j = 0; j < m; j++)
			if (f[i][j][0] > f[x][y][0])
				x = i, y = j;

		cout << f[x][y][0] << el << fs[x][y][0];

		return 0;
    }

	for (int i = 0; i < n - 1; i++)
	for (int j = 0; j < m; j++)
        if (i == 0) {
			if (s[i][j] == 'M') {
				f[i][j][0] = 0;
                if (j - 1 >= 0 && s[i + 1][j - 1] != '*') {
					if (s[i + 1][j - 1] == '.') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j - 1][k] = max(f[i + 1][j - 1][k], f[i][j][k]);
					} else {
						if (s[i + 1][j - 1] == '(') {
							for (int k = 0; k < n; k++)
								if (f[i][j][k] != -1)
									f[i + 1][j - 1][k + 1] = max(f[i + 1][j - 1][k + 1], f[i][j][k] + 1);
						} else {
                            for (int k = 1; k < n; k++)
								if (f[i][j][k] != -1)
									f[i + 1][j - 1][k - 1] = max(f[i + 1][j - 1][k - 1], f[i][j][k] + 1);
						}
					}
                }
                if (s[i + 1][j] != '*') {
					if (s[i + 1][j] == '.') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j][k] = max(f[i + 1][j][k], f[i][j][k]);
					} else {
						if (s[i + 1][j] == '(') {
							for (int k = 0; k < n; k++)
								if (f[i][j][k] != -1)
									f[i + 1][j][k + 1] = max(f[i + 1][j][k + 1], f[i][j][k] + 1);
						} else {
                            for (int k = 1; k < n; k++)
								if (f[i][j][k] != -1)
									f[i + 1][j][k - 1] = max(f[i + 1][j][k - 1], f[i][j][k] + 1);
						}
					}
                }
                if (j + 1 < m && s[i + 1][j + 1] != '*') {
					if (s[i + 1][j + 1] == '.') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j + 1][k] = max(f[i + 1][j + 1][k], f[i][j][k]);
					} else {
						if (s[i + 1][j + 1] == '(') {
							for (int k = 0; k < n; k++)
								if (f[i][j][k] != -1)
									f[i + 1][j + 1][k + 1] = max(f[i + 1][j + 1][k + 1], f[i][j][k] + 1);
						} else {
                            for (int k = 1; k < n; k++)
								if (f[i][j][k] != -1)
									f[i + 1][j + 1][k - 1] = max(f[i + 1][j + 1][k - 1], f[i][j][k] + 1);
						}
					}
                }
			}
        } else {
			if (j - 1 >= 0 && s[i + 1][j - 1] != '*') {
				if (s[i + 1][j - 1] == '.') {
					for (int k = 0; k < n; k++)
						if (f[i][j][k] != -1)
							f[i + 1][j - 1][k] = max(f[i + 1][j - 1][k], f[i][j][k]);
				} else {
					if (s[i + 1][j - 1] == '(') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j - 1][k + 1] = max(f[i + 1][j - 1][k + 1], f[i][j][k] + 1);
					} else {
						for (int k = 1; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j - 1][k - 1] = max(f[i + 1][j - 1][k - 1], f[i][j][k] + 1);
					}
				}
			}
			if (s[i + 1][j] != '*') {
				if (s[i + 1][j] == '.') {
					for (int k = 0; k < n; k++)
						if (f[i][j][k] != -1)
							f[i + 1][j][k] = max(f[i + 1][j][k], f[i][j][k]);
				} else {
					if (s[i + 1][j] == '(') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j][k + 1] = max(f[i + 1][j][k + 1], f[i][j][k] + 1);
					} else {
						for (int k = 1; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j][k - 1] = max(f[i + 1][j][k - 1], f[i][j][k] + 1);
					}
				}
			}
			if (j + 1 < m && s[i + 1][j + 1] != '*') {
				if (s[i + 1][j + 1] == '.') {
					for (int k = 0; k < n; k++)
						if (f[i][j][k] != -1)
							f[i + 1][j + 1][k] = max(f[i + 1][j + 1][k], f[i][j][k]);
				} else {
					if (s[i + 1][j + 1] == '(') {
						for (int k = 0; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j + 1][k + 1] = max(f[i + 1][j + 1][k + 1], f[i][j][k] + 1);
					} else {
						for (int k = 1; k < n; k++)
							if (f[i][j][k] != -1)
								f[i + 1][j + 1][k - 1] = max(f[i + 1][j + 1][k - 1], f[i][j][k] + 1);
					}
				}
			}
		}

    int mx = 0;
    for (int i = 0; i < n; i++)
	for (int j = 0; j < m; j++)
		mx = max(mx, f[i][j][0]);

	cout << mx << el;
	cout << "()";
}

Compilation message (stderr)

retro.cpp: In function 'int main()':
retro.cpp:284:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i = 0; i < n; i++)
     ^~~
retro.cpp:288:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  cout << mx << el;
  ^~~~

• Subtask 1: 49 / 100