#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second
const int mxn = 1000;
int n, m;
int dp[mxn][mxn][2], dp2[mxn][mxn][2], f[mxn][mxn][2];
vector<int> g[mxn], gr[mxn];
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
for(int i = 0, x; i < n; i++)
for(cin >> x; x; cin >> x)
for(int j = 0; j < 2; j++)
for(int l = 0; l < 2; l++){
int u = j * n + i, v = l * n + x - 1;
if(abs(u - v) < n){
g[u].push_back(v);
gr[v].push_back(u);
}
}
for(int i[2] = {0}; i[1] < 2 * n; i[1]++)
for(i[0] = i[1]; ~i[0] && i[1] - i[0] < n; i[0]--)
for(int j = 0; j < 2; j++){
int dpc = dp[i[0]][i[1]][j], dpc2 = dp2[i[0]][i[1]][j];
if(i[0] != i[1]) f[i[0]][i[1]][j] = max(dpc, f[i[0] + j][i[1] - !j][j]);
for(int k : gr[i[j]]) if(k != i[!j])
for(int l = 0, ii[2]; l < 2; l++) if((k > i[l]) == l && abs(k - i[!l]) < n){
ii[l] = k, ii[!l] = i[!l];
int &dpx = dp[ii[0]][ii[1]][l], &dpx2 = dp2[ii[0]][ii[1]][l];
dpx = max(dpx, dpc + 1);
if(j == l && (i[0] == i[1] || dpc2)) dpx2 = max(dpx2, dpc2 + 1);
}
}
int ret = 0, x = 0;
for(int i[2] = {0}; i[1] < 2 * n; i[1]++)
for(i[0] = i[1]; ~i[0] && i[1] - i[0] < n; i[0]--)
for(int j = 0; j < 2; j++){
int dpc = dp[i[0]][i[1]][j], dpc2 = dp2[i[0]][i[1]][j];
if(dpc > ret) ret = dpc, x = i[j];
if(m && (i[0] == i[1] || dpc2)){
for(int p = 0, ii[2]; p < 2; p++){
int d = 1 - 2 * (j ^ p), k = -1;
for(int l : g[i[!j]]){
if(l != i[p] && (l > i[p]) == p && abs(l - i[!p]) < n &&
(!~k || d * abs(l - i[!p]) > d * abs(k - i[!p]))){
k = l;
}
}
if(~k) for(int l : gr[i[j]]){
if(l != i[p] && (l > i[p]) == p &&
abs(l - i[!p]) < n && l != k && (l > k) == j){
ii[p] = k, ii[!p] = ~d ? i[j] : l;
int c = f[ii[0] + p][ii[1] - !p][p] + dpc2 + 2;
if(c > ret) ret = c, x = l;
}
}
}
}
}
cout << ret << endl;
cout << (x % n + 1) << endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
620 KB |
Output is correct |
| 2 |
Correct |
1 ms |
876 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 4 |
Incorrect |
3 ms |
1388 KB |
Output isn't correct |
| 5 |
Correct |
3 ms |
1644 KB |
Output is correct |
| 6 |
Correct |
7 ms |
2028 KB |
Output is correct |
| 7 |
Correct |
11 ms |
2412 KB |
Output is correct |
| 8 |
Incorrect |
11 ms |
2540 KB |
Output isn't correct |
| 9 |
Correct |
16 ms |
3052 KB |
Output is correct |
| 10 |
Correct |
41 ms |
3564 KB |
Output is correct |
| 11 |
Correct |
25 ms |
3308 KB |
Output is correct |
| 12 |
Correct |
107 ms |
6784 KB |
Output is correct |
| 13 |
Correct |
197 ms |
11000 KB |
Output is correct |
| 14 |
Correct |
205 ms |
15852 KB |
Output is correct |
| 15 |
Incorrect |
1183 ms |
22068 KB |
Output isn't correct |
| 16 |
Incorrect |
1472 ms |
22380 KB |
Output isn't correct |
| 17 |
Incorrect |
1255 ms |
22092 KB |
Output isn't correct |
| 18 |
Correct |
254 ms |
21228 KB |
Output is correct |
| 19 |
Correct |
1780 ms |
22892 KB |
Output is correct |
| 20 |
Correct |
1764 ms |
22900 KB |
Output is correct |
