/// 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];
int dp1[N][N][2];
int nxt(int x) {
if (x == 1) return n;
return x - 1;
}
int prv(int x) {
if (x == n) return 1;
return x + 1;
}
int calc(int A, int B, int t) {
if (~dp[A][B][t]) return dp[A][B][t];
int res = 0;
if (t) {
for (int i = nxt(A); i != B; i = nxt(i)) {
if (ok[B][i]) {
res = max(res, calc(A, i, 1) + 1);
res = max(res, calc(B, i, 0) + 1);
}
}
}
else {
for (int i = prv(A); i != B; i = prv(i)) {
if (ok[B][i]) {
res = max(res, calc(A, i, 0) + 1);
res = max(res, calc(B, i, 1) + 1);
}
}
}
return dp[A][B][t] = res;
}
int f(int A, int B, int t) {
if (A == B) return 0;
if (~dp1[A][B][t]) return dp1[A][B][t];
int res = -inf;
if (t) {
for (int i = nxt(A); ; i = nxt(i)) {
if (ok[A][i]) res = max(res, f(i, B, 1) + 1);
if (i == B) break;
}
}
else {
for (int i = prv(A); ; i = prv(i)) {
if (ok[A][i]) res = max(res, f(i, B, 0) + 1);
if (i == B) break;
}
}
return dp1[A][B][t] = res;
}
int mx, opt;
int res[N];
void bye() {
printf ("%d\n%d", mx, opt);
ioi
}
void solve() {
memset(dp1, -1, sizeof(dp1));
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
f(i, j, 0), f(i, j, 1);
}
}
for (int j = 1; j <= n; j++) {
for (int l = prv(j); l != j; l = prv(l)) {
int mxi = -1, opti = -1;
for (int r = prv(l); r != j; r = prv(r)) {
///case1
if (opti != -1 && ok[r][l] && 2 + dp1[j][r][1] + dp[j][l][0] > mx) {
mx++;
opt = opti;
bye();
}
///case2
if (opti != -1 && ok[r][l] && 2 + mxi + dp1[j][r][1] > mx) {
mx++;
opt = opti;
bye();
}
///case3
if (opti != -1 && ok[r][l] && 2 + dp1[j][l][0] + dp[j][r][1] > mx) {
mx++;
opt = opti;
bye();
}
if (ok[r][j] && dp[r][l][1] > mxi) {
mxi = dp[r][l][1];
opti = r;
bye();
}
}
}
}
assert(0);
}
int main() {
#ifdef IOI2018
freopen ("in.txt", "r", stdin);
#endif
scanf ("%d%d", &n, &k);
for (int i = 1; i <= n; i++) {
int to;
while (scanf ("%d", &to) && to) {
ok[i][to] = 1;
}
}
memset(dp, -1, sizeof(dp));
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
calc(i, j, 0), calc(i, j, 1);
if (ok[i][j]) res[i] = max(res[i], max(calc(i, j, 0), calc(i, j, 1)) + 1);
if (res[i] > mx) mx = res[i], opt = i;
}
}
if (k == 1) solve();
else bye();
bye();
ioi
}
Compilation message
race.cpp: In function 'int main()':
race.cpp:144:24: 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 |
6304 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
6304 KB |
Output isn't correct |
| 3 |
Incorrect |
0 ms |
6304 KB |
Output isn't correct |
| 4 |
Incorrect |
0 ms |
6304 KB |
Output isn't correct |
| 5 |
Correct |
3 ms |
6304 KB |
Output is correct |
| 6 |
Incorrect |
6 ms |
6304 KB |
Output isn't correct |
| 7 |
Correct |
3 ms |
6304 KB |
Output is correct |
| 8 |
Incorrect |
0 ms |
6304 KB |
Output isn't correct |
| 9 |
Correct |
6 ms |
6304 KB |
Output is correct |
| 10 |
Correct |
6 ms |
6304 KB |
Output is correct |
| 11 |
Correct |
6 ms |
6304 KB |
Output is correct |
| 12 |
Incorrect |
66 ms |
6304 KB |
Output isn't correct |
| 13 |
Incorrect |
163 ms |
6304 KB |
Output isn't correct |
| 14 |
Correct |
183 ms |
6304 KB |
Output is correct |
| 15 |
Incorrect |
896 ms |
6304 KB |
Output isn't correct |
| 16 |
Incorrect |
949 ms |
6304 KB |
Output isn't correct |
| 17 |
Incorrect |
859 ms |
6304 KB |
Output isn't correct |
| 18 |
Correct |
359 ms |
6304 KB |
Output is correct |
| 19 |
Incorrect |
1129 ms |
6304 KB |
Output isn't correct |
| 20 |
Incorrect |
1106 ms |
6304 KB |
Output isn't correct |
