/// In The Name Of God
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")
#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pp pop_back
#define mp make_pair
#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()
#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define nl '\n'
#define ioi exit(0);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
const int N = (int)500 + 7, inf = (int)1e9 + 7, mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;
const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1}, dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
using namespace std;
int n, k;
vector <int> g[N];
bool ok[N][N];
int dp[N][N][2][2];
int calc(int l, int r, bool type, bool f) {
if (~dp[l][r][type][f]) return dp[l][r][type][f];
int v = !f ? l : r;
int res = 0;
for (auto to : g[v]) {
if (to == l || to == r) continue;
if (type) {
if (l < to && to < r) {
res = max(res, max(calc(l, to, type, 1), calc(to, r, type, 0)) + 1);
}
}
else {
if (!(l < to && to < r)) {
if (to > r) {
res = max(res, max(calc(l, to, 0, 1), calc(r, to, 1, 1)) + 1);
}
else {
res = max(res, max(calc(to, l, 1, 0), calc(to, r, 0, 0)) + 1);
}
}
}
}
return dp[l][r][type][f] = res;
}
int main() {
#ifdef IOI2018
freopen ("in.txt", "r", stdin);
#endif
srand(time(0));
scanf ("%d%d", &n, &k);
for (int i = 1; i <= n; i++) {
int to;
while (scanf ("%d", &to) && to) {
ok[i][to] = 1;
g[i].pb(to);
}
}
if (n == 1) {
printf ("0\n1");
ioi
}
if (!k || k) {
int mx = 0, opt = 1;
memset(dp, -1, sizeof(dp));
vector <int> can;
for (int i = 1; i <= n; i++) {
for (auto to : g[i]) {
int now = max(calc(min(i, to), max(i, to), 0, i < to), calc(min(i, to), max(i, to), 1, i < to)) + 1;
if (now > mx) {
mx = now;
opt = i;
}
}
}
for (int i = 1; i <= n; i++) {
for (auto to : g[i]) {
int now = max(calc(min(i, to), max(i, to), 0, i < to), calc(min(i, to), max(i, to), 1, i < to)) + 1;
if (now == mx) {
can.pb(i);
}
}
}
if (!k) printf ("%d\n%d", mx, opt);
else {
random_shuffle(all(can));
printf ("%d\n%d", mx + 1, can[0]);
}
ioi
}
else assert(0);
ioi
}
Compilation message
race.cpp: In function 'int main()':
race.cpp:68:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf ("%d%d", &n, &k);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
6300 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
6300 KB |
Output isn't correct |
| 3 |
Incorrect |
0 ms |
6300 KB |
Output isn't correct |
| 4 |
Incorrect |
3 ms |
6300 KB |
Output isn't correct |
| 5 |
Correct |
3 ms |
6300 KB |
Output is correct |
| 6 |
Incorrect |
0 ms |
6300 KB |
Output isn't correct |
| 7 |
Correct |
6 ms |
6300 KB |
Output is correct |
| 8 |
Incorrect |
3 ms |
6300 KB |
Output isn't correct |
| 9 |
Correct |
3 ms |
6300 KB |
Output is correct |
| 10 |
Correct |
13 ms |
6432 KB |
Output is correct |
| 11 |
Correct |
6 ms |
6300 KB |
Output is correct |
| 12 |
Incorrect |
23 ms |
6300 KB |
Output isn't correct |
| 13 |
Incorrect |
46 ms |
6300 KB |
Output isn't correct |
| 14 |
Correct |
76 ms |
6432 KB |
Output is correct |
| 15 |
Incorrect |
329 ms |
6432 KB |
Output isn't correct |
| 16 |
Incorrect |
456 ms |
6564 KB |
Output isn't correct |
| 17 |
Incorrect |
386 ms |
6432 KB |
Output isn't correct |
| 18 |
Correct |
123 ms |
6432 KB |
Output is correct |
| 19 |
Incorrect |
479 ms |
6564 KB |
Output isn't correct |
| 20 |
Incorrect |
493 ms |
6564 KB |
Output isn't correct |
