#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
/*const int MOD = ;
inline int lgput(int a, int b) {
int ans = 1;
while(b > 0) {
if(b & 1) ans = (1LL * ans * a) % MOD;
b >>= 1;
a = (1LL * a * a) % MOD;
}
return ans;
}
inline void mod(int &x) {
if(x >= MOD)
x -= MOD;
}
inline void add(int &x, int y) {
x += y;
mod(x);
}
inline void sub(int &x, int y) {
x += MOD - y;
mod(x);
}
inline void mul(int &x, int y) {
x = (1LL * x * y) % MOD;
}
inline int inv(int x) {
return lgput(x, MOD - 2);
}*/
/*int fact[], invfact[];
inline void prec(int n) {
fact[0] = 1;
for(int i = 1; i <= n; i++) {
fact[i] = (1LL * fact[i - 1] * i) % MOD;
}
invfact[n] = lgput(fact[n], MOD - 2);
for(int i = n - 1; i >= 0; i--) {
invfact[i] = (1LL * invfact[i + 1] * (i + 1)) % MOD;
}
}
inline int comb(int n, int k) {
if(n < k) return 0;
return (1LL * fact[n] * (1LL * invfact[k] * invfact[n - k] % MOD)) % MOD;
}*/
using namespace std;
const int INF = 1e9;
const int MAXN = 500;
bool edge[MAXN][MAXN];
int dp[MAXN][MAXN][2];
int best[MAXN];
int main() {
#if 0
ifstream cin("A.in");
ofstream cout("A.out");
#endif
int i, j, n, k;
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
cin >> n >> k;
vector < vector <int> > g(n);
for(i = 0; i < n; i++) {
int x;
cin >> x;
while(x != 0) {
x--;
edge[i][x] = 1;
g[i].push_back(x);
cin >> x;
}
}
auto get = [&](int x) {
return (x >= n ? x - n : x);
};
auto prv = [&](int x) {
return (x == 0 ? n - 1 : x - 1);
};
auto nxt = [&](int x) {
return (x == n - 1 ? 0 : x + 1);
};
for(int len = 2; len < n; len++) {
for(i = 0; i < n; i++) {
j = get(i + len);
for(int k = nxt(i); k != j; k = nxt(k)) {
int cur = 1 + max(dp[i][k][1], dp[k][j][0]);
if(edge[i][k]) dp[i][j][0] = max(dp[i][j][0], cur);
if(edge[j][k]) dp[i][j][1] = max(dp[i][j][1], cur);
}
}
}
auto combine = [&](pair <int, int> &ans, pair <int, int> cur) {
if(ans.first < cur.first) {
swap(ans, cur);
}
};
pair <int, int> ans = {0, 0};
for(i = 0; i < n; i++) {
for(j = 0; j < n; j++) {
if(edge[i][j]) {
combine(ans, {max(dp[j][i][0], dp[i][j][1]) + 1, i});
}
}
}
if(k == 0) {
cout << ans.first << "\n" << ans.second + 1;
return 0;
}
for(int len = 1; len < n - 1; len++) {
for(i = 0; i < n; i++) {
j = get(i + len);
dp[i][nxt(j)][0] = max(dp[i][nxt(j)][0], dp[i][j][0]);
dp[prv(i)][j][1] = max(dp[prv(i)][j][1], dp[i][j][1]);
}
}
for(i = 0; i < n; i++) {
for(auto j : g[i]) {
fill(best, best + n, -INF);
best[j] = 0;
for(int k = j; ; k = nxt(k)) {
for(auto it : g[k]) {
best[it] = max(best[it], best[k] + 1);
}
for(auto it : g[k]) {
if((i < j && i <= it && it <= j) || (i > j && (it >= i || it <= j))) continue;
combine(ans, {2 + best[k] + max(dp[it][j][0], dp[i][it][1]), i});
}
if(k == i) {
break;
}
}
fill(best, best + n, -INF);
best[j] = 0;
for(int k = j; ; k = prv(k)) {
for(auto it : g[k]) {
best[it] = max(best[it], best[k] + 1);
}
for(auto it : g[k]) {
if((i < j && i <= it && it <= j) || (i > j && (it >= i || it <= j))) continue;
combine(ans, {2 + best[k] + max(dp[it][i][0], dp[j][it][1]), i});
}
if(k == i) {
break;
}
}
}
}
cout << ans.first << "\n" << ans.second + 1;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
| 3 |
Incorrect |
2 ms |
504 KB |
Output isn't correct |
| 4 |
Incorrect |
3 ms |
504 KB |
Output isn't correct |
| 5 |
Correct |
3 ms |
508 KB |
Output is correct |
| 6 |
Incorrect |
9 ms |
632 KB |
Output isn't correct |
| 7 |
Correct |
4 ms |
632 KB |
Output is correct |
| 8 |
Incorrect |
11 ms |
760 KB |
Output isn't correct |
| 9 |
Correct |
7 ms |
760 KB |
Output is correct |
| 10 |
Correct |
6 ms |
888 KB |
Output is correct |
| 11 |
Correct |
9 ms |
860 KB |
Output is correct |
| 12 |
Incorrect |
299 ms |
1272 KB |
Output isn't correct |
| 13 |
Incorrect |
478 ms |
1912 KB |
Output isn't correct |
| 14 |
Correct |
286 ms |
2168 KB |
Output is correct |
| 15 |
Execution timed out |
3035 ms |
2680 KB |
Time limit exceeded |
| 16 |
Execution timed out |
3028 ms |
2808 KB |
Time limit exceeded |
| 17 |
Execution timed out |
3052 ms |
2680 KB |
Time limit exceeded |
| 18 |
Correct |
280 ms |
2680 KB |
Output is correct |
| 19 |
Execution timed out |
3042 ms |
2808 KB |
Time limit exceeded |
| 20 |
Execution timed out |
3044 ms |
2808 KB |
Time limit exceeded |
