#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define f first
#define s second
#define pb push_back
#define ep emplace
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define uniquev(v) sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define mem(f,x) memset(f , x , sizeof(f))
#define sz(x) (int)(x).size()
#define __lcm(a, b) (1ll * ((a) / __gcd((a), (b))) * (b))
#define mxx *max_element
#define mnn *min_element
#define cntbit(x) __builtin_popcountll(x)
#define len(x) (int)(x.length())
const int N = 1e6 + 10;
vector <int> pos[N];
int a[N], dp[N], pr[N], n;
pair <int, int> b[N];
vector <int> val[N];
int trace[N];
int bin(int lim) {
val[0].pb(0);
for (int i = 1; i <= n; i++) {
int t = dp[i];
if (t == -1)
continue;
int p = lower_bound(all(val[t - 1]), i - lim) - val[t - 1].begin();
if (p < sz(val[t - 1]) && b[i].f <= i - val[t - 1][p]) {
trace[i] = val[t - 1][p];
val[dp[i]].pb(i);
}
}
for (int i = 0; i <= n; i++)
val[i].clear();
return trace[n];
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i];
pos[a[i]].pb(i);
}
int sz = 0;
for (int i = 1; i <= n; i++) {
for (auto x : pos[i]) {
sz++;
b[sz] = {i, x};
}
}
dp[0] = pr[0] = 0;
val[0].pb(0);
for (int i = 1; i <= n; i++) {
if (i < b[i].f) {
dp[i] = -1;
} else {
dp[i] = pr[i - b[i].f] + 1;
}
pr[i] = dp[i] > dp[pr[i - 1]] ? i : pr[i - 1];
}
int l = 0, r = n, m, ans = n;
while (l <= r) {
mem(trace, -1);
m = (l + r) / 2;
if (bin(m) >= 0) {
ans = m;
r = m - 1;
} else {
l = m + 1;
}
}
cout << dp[n] << '\n';
bin(ans);
vector < vector <int>> save;
for (int i = n; i >= 1; i--) {
cout << i - trace[i] << " ";
for (int j = i; j > trace[i]; j--) {
cout << b[j].s << " ";
}
i = trace[i] + 1;
cout << '\n';
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
29 ms |
52816 KB |
Output is correct |
2 |
Incorrect |
26 ms |
51292 KB |
Integer parameter [name=s_i] equals to 21, violates the range [1, 20] |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
26 ms |
51292 KB |
Integer parameter [name=s_i] equals to 101, violates the range [1, 100] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
31 ms |
51548 KB |
Integer parameter [name=s_i] equals to 201, violates the range [1, 200] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
28 ms |
51548 KB |
Integer parameter [name=s_i] equals to 5000, violates the range [1, 4999] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
27 ms |
51544 KB |
Integer parameter [name=s_i] equals to 5001, violates the range [1, 5000] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
52 ms |
54108 KB |
Integer parameter [name=s_i] equals to 80006, violates the range [1, 80005] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
45 ms |
54608 KB |
Integer parameter [name=s_i] equals to 90004, violates the range [1, 90003] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
202 ms |
79540 KB |
Integer parameter [name=s_i] equals to 750014, violates the range [1, 750013] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
272 ms |
89832 KB |
Integer parameter [name=s_i] equals to 1000001, violates the range [1, 1000000] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
296 ms |
92712 KB |
Integer parameter [name=s_i] equals to 1000001, violates the range [1, 1000000] |
2 |
Halted |
0 ms |
0 KB |
- |