| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 236239 |
2020-05-31T18:19:14 Z |
Vimmer |
Retro (COCI17_retro) |
C++14 |
|
500 ms |
155640 KB |
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")
#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define N 100001
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9
using namespace std;
//using namespace __gnu_pbds;
typedef long double ld;
typedef long long ll;
typedef short int si;
typedef array <int, 2> a2;
//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
vector <char> ans, ndp[101][101][101], dp[101][101][101];
bool nmk[101][101][101], mk[101][101][101];
int f[301][301][301];
bool low(vector <char> &a, vector <char> &b)
{
for (int i = 0; i < sz(a); i++)
{
if (a[i] == b[i]) continue;
return a[i] == '(';
}
return 0;
}
int main()
{
//freopen("input.txt", "r", stdin); //freopen("output4.txt", "w", stdout);
ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int n, m;
cin >> n >> m;
string s[n];
for (int i = 0; i < n; i++) cin >> s[i];
int sx, sy;
for (int i = 0; i < m; i++)
if (s[n - 1][i] == 'M') {sx = n - 1; sy = i; break;}
if (n <= 100)
{
mk[sy][0][0] = 1;
for (int i = n - 1; i >= 0; i--)
{
for (int j = 0; j < m; j++)
for (int k = 0; k < n - i; k++)
for (int kr = 0; kr <= k; kr++)
{
if (!mk[j][k][kr]) continue;
if (k == kr && (k + kr > sz(ans) || (k + k == sz(ans) && low(dp[j][k][kr], ans)))) ans = dp[j][k][kr];
if (s[i][j] == '*' || i == 0) continue;
for (int a = -1; a <= 1; a++)
if (a + j >= 0 && a + j < m && (k != kr || s[i - 1][j + a] != ')'))
{
int nw = kr, nk = k;
vector <char> nr = dp[j][k][kr];
if (s[i - 1][j + a] == '(') {nr.pb('('); nk++;}
if (s[i - 1][j + a] == ')') {nr.pb(')'); nw++;}
if (!nmk[j + a][nk][nw] || low(nr, ndp[j + a][nk][nw])) {nmk[j + a][nk][nw] = 1; ndp[j + a][nk][nw] = nr;}
}
}
for (int j = 0; j < m; j++)
for (int k = 0; k <= n - i; k++)
for (int kr = 0; kr <= k; kr++) {dp[j][k][kr] = ndp[j][k][kr]; ndp[j][k][kr].clear(); mk[j][k][kr] = nmk[j][k][kr]; nmk[j][k][kr] = 0;}
}
cout << sz(ans) << endl;
for (auto it : ans) cout << it;
exit(0);
}
memset(f, -1, sizeof(f));
f[sx][sy][0] = 0;
int I = -1, J, K;
for (int i = n - 1; i > 0; i--)
for (int j = 0; j < m; j++)
for (int k = 0; k <= n - i - 1; k++)
{
if (f[i][j][k] == k && (I == -1 || K + K < k + k)) {I = i; J = j; K = k;}
if (f[i][j][k] == -1 || s[i][j] == '*') continue;
for (int a = -1; a <= 1; a++)
if (a + j >= 0 && a + j < m && (f[i][j][k] < k || s[i - 1][j + a] != ')'))
{
int nw = f[i][j][k], nk = k;
if (s[i - 1][j + a] == '(') nk++;
if (s[i - 1][j + a] == ')') nw++;
if (f[i - 1][j + a][nk] < nw) f[i - 1][j + a][nk] = nw;
}
}
for (int j = 0; j < m; j++)
for (int k = 0; k <= n; k++)
if (f[0][j][k] == k && (I == -1 || K + K < k + k)) {I = 0; J = j; K = k;}
if (I == -1) cout << 0 << endl;
else
{
cout << K + K << endl;
int val = K;
vector <char> g; g.clear();
while (I != n - 1)
{
int pos = -1;
for (int a = -1; a <= 1; a++)
if (a + J < m && a + J >= 0 && f[I + 1][a + J][K] == val && s[I + 1][a + J] != '#') pos = a + J;
if (pos == -1)
{
if (s[I][J] == ')')
{
g.pb(')');
val--;
for (int a = -1; a <= 1; a++)
if (a + J < m && a + J >= 0 && f[I + 1][a + J][K] == val && s[I + 1][a + J] != '#') pos = a + J;
}
else
{
g.pb('(');
K--;
for (int a = -1; a <= 1; a++)
if (a + J < m && a + J >= 0 && f[I + 1][a + J][K] == val && s[I + 1][a + J] != '#') pos = a + J;
}
}
J = pos;
I++;
}
for (int i = sz(g) - 1; i >= 0; i--) cout << g[i];
}
}
Compilation message
retro.cpp: In function 'int main()':
retro.cpp:121:58: warning: 'K' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (f[i][j][k] == k && (I == -1 || K + K < k + k)) {I = i; J = j; K = k;}
~~~~~~^~~~~~~
retro.cpp:70:22: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized]
mk[sy][0][0] = 1;
~~~~~~~~~~~~~^~~
retro.cpp:113:18: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized]
f[sx][sy][0] = 0;
~~~~~~~~~~~~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
34 ms |
48788 KB |
Output is correct |
| 2 |
Correct |
32 ms |
49024 KB |
Output is correct |
| 3 |
Correct |
39 ms |
48888 KB |
Output is correct |
| 4 |
Correct |
32 ms |
49024 KB |
Output is correct |
| 5 |
Correct |
32 ms |
49916 KB |
Output is correct |
| 6 |
Correct |
201 ms |
51704 KB |
Output is correct |
| 7 |
Correct |
273 ms |
52728 KB |
Output is correct |
| 8 |
Correct |
187 ms |
50808 KB |
Output is correct |
| 9 |
Execution timed out |
525 ms |
53880 KB |
Time limit exceeded |
| 10 |
Execution timed out |
570 ms |
54776 KB |
Time limit exceeded |
| 11 |
Partially correct |
137 ms |
155640 KB |
Partially correct |
| 12 |
Partially correct |
138 ms |
155512 KB |
Partially correct |
| 13 |
Partially correct |
110 ms |
155512 KB |
Partially correct |
| 14 |
Partially correct |
110 ms |
155512 KB |
Partially correct |
| 15 |
Partially correct |
149 ms |
155512 KB |
Partially correct |
| 16 |
Partially correct |
144 ms |
155512 KB |
Partially correct |
| 17 |
Partially correct |
143 ms |
155640 KB |
Partially correct |
| 18 |
Partially correct |
135 ms |
155512 KB |
Partially correct |
| 19 |
Partially correct |
149 ms |
155640 KB |
Partially correct |
| 20 |
Partially correct |
143 ms |
155512 KB |
Partially correct |
