#include <bits/stdc++.h>
using namespace std;
const int maxn = 505, inf = 1e9;
int n, id;
vector<int> adj[maxn];
vector<int> radj[maxn];
bool between(int l, int r, int i) {
if(l > r) {
return i >= l || i <= r;
} else {
return i >= l && i <= r;
}
}
int dist(int i, int j) {
if(i <= j)
return j - i;
return n - i + j;
}
int dp[2][2][maxn][maxn];
int f[2][maxn][maxn];
int main() {
ios_base::sync_with_stdio(false);
cin >> n >> id;
for(int i = 0, j; i < n; i++) {
while(true) {
cin >> j;
if(!j) break;
j--;
adj[i].push_back(j);
radj[j].push_back(i);
}
}
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
f[0][i][j] = -1;
f[1][i][j] = -1;
for(int k : radj[i]) {
if(between(j, i, k))
continue;
if(f[0][i][j] == -1)
f[0][i][j] = k;
if(dist(i, f[0][i][j]) < dist(i, k))
f[0][i][j] = k;
}
for(int k : radj[i]) {
if(between(i, j, k))
continue;
if(f[1][i][j] == -1)
f[1][i][j] = k;
if(dist(i, f[1][i][j]) > dist(i, k))
f[1][i][j] = k;
}
}
}
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
dp[1][0][i][j] = -inf;
dp[1][1][i][j] = -inf;
}
}
for(int i = 0; i < n; i++) {
dp[1][0][i][i] = 0;
dp[1][1][i][i] = 0;
}
for(int len = 1; len < n; len++) {
for(int i = 0; i < n; i++) {
int j = (i + len) % n;
for(int k : radj[j]) {
if(between(i, j, k)) {
dp[1][0][i][j] = max(dp[1][0][i][j], 1 + dp[1][0][i][k]);
}
}
for(int k : radj[i]) {
if(between(i, j, k)) {
dp[1][1][i][j] = max(dp[1][1][i][j], 1 + dp[1][1][k][j]);
}
}
for(int k : adj[i]) {
if(between(i, j, k)) {
dp[0][0][i][j] = max(dp[0][0][i][j], 1 + max(dp[0][1][(i + 1) % n][k], dp[0][0][k][j]));
}
}
for(int k : adj[j]) {
if(between(i, j, k)) {
dp[0][1][i][j] = max(dp[0][1][i][j], 1 + max(dp[0][1][i][k], dp[0][0][k][(j - 1 + n) % n]));
}
}
}
}
int mxm = 0, t = 0;
for(int i = 0; i < n; i++) {
int tmp = dp[0][0][i][(i - 1 + n) % n];
if(tmp > mxm) {
mxm = tmp;
t = i;
}
}
if(id) {
for(int i = 0; i < n; i++) {
for(int j = 0, l; j < n; j++) {
if(i == j)
continue;
for(int k : adj[j]) {
if(i == k || j == k)
continue;
if(between(j, k, i))
l = f[0][i][j];
else
l = f[1][i][j];
if(l == i || l == j || l == k || l == -1)
continue;
if(between(j, k, i)) {
int tmp = 0;
if(between(k, j, l)) {
tmp = dp[1][1][j][i] + 2 + max(dp[0][1][(i + 1) % n][k], dp[0][0][k][l]);
}
if(tmp > mxm) {
mxm = tmp;
t = l;
}
} else {
int tmp = 0;
if(between(j, k, l)) {
tmp = dp[1][0][i][j] + 2 + max(dp[0][0][k][(i - 1 + n) % n], dp[0][1][k][l]);
}
if(tmp > mxm) {
mxm = tmp;
t = l;
}
}
}
}
}
}
cout << mxm << endl << t + 1 << endl;
// for(int i = 0; i < n; i++) {
// for(int j = 0; j < n; j++) {
// int k = dp[0][1][i][j];
// if(k < 0)
// cout << 'x' << " ";
// else
// cout << k << " ";
// }
// cout << endl;
// }
// for(int i = 0; i < n; i++) {
// for(int j = 0; j < n; j++) {
// cout << f[i][j] << " ";
// }
// cout << endl;
// }
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
504 KB |
Output is correct |
2 |
Incorrect |
2 ms |
680 KB |
Output isn't correct |
3 |
Incorrect |
2 ms |
748 KB |
Output isn't correct |
4 |
Incorrect |
4 ms |
972 KB |
Output isn't correct |
5 |
Correct |
4 ms |
1148 KB |
Output is correct |
6 |
Incorrect |
6 ms |
1280 KB |
Output isn't correct |
7 |
Correct |
12 ms |
1408 KB |
Output is correct |
8 |
Incorrect |
6 ms |
1484 KB |
Output isn't correct |
9 |
Correct |
13 ms |
1616 KB |
Output is correct |
10 |
Correct |
27 ms |
1792 KB |
Output is correct |
11 |
Correct |
16 ms |
1792 KB |
Output is correct |
12 |
Incorrect |
64 ms |
3088 KB |
Output isn't correct |
13 |
Incorrect |
117 ms |
4144 KB |
Output isn't correct |
14 |
Correct |
150 ms |
5552 KB |
Output is correct |
15 |
Incorrect |
1031 ms |
7008 KB |
Output isn't correct |
16 |
Incorrect |
1276 ms |
7092 KB |
Output isn't correct |
17 |
Incorrect |
1045 ms |
7092 KB |
Output isn't correct |
18 |
Correct |
253 ms |
7092 KB |
Output is correct |
19 |
Incorrect |
1499 ms |
7228 KB |
Output isn't correct |
20 |
Incorrect |
1821 ms |
7228 KB |
Output isn't correct |