This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "advisor.h"
#include <bits/stdc++.h>
#define pb push_back
using namespace std;
struct Segtree {
int n;
vector<pair<int, int>> st;
Segtree(const vector<int>& a) {
n = a.size();
st = vector<pair<int, int>>(4*n);
build(1, 0, n-1, a);
}
void build(int p, int l, int r, const vector<int>& a) {
if (l == r) st[p] = {a[l], l};
else {
int m = (l+r)/2;
build(2*p, l, m, a);
build(2*p+1, m+1, r, a);
if (st[2*p] > st[2*p+1]) st[p] = st[2*p];
else st[p] = st[2*p+1];
}
}
void change(int p, int l, int r, int i, int v) {
if (l == r) st[p] = {v, i};
else {
int m = (l+r)/2;
if (i <= m) change(2*p, l, m, i, v);
else change(2*p+1, m+1, r, i, v);
if (st[2*p] > st[2*p+1]) st[p] = st[2*p];
else st[p] = st[2*p+1];
}
}
pair<int, int> Max(int p, int l, int r, int i, int j) {
if (i > j) return {0, -1};
if (i == l && j == r) return st[p];
int m = (l+r)/2;
pair<int, int> a = Max(2*p, l, m, i, min(m, j));
pair<int, int> b = Max(2*p+1, m+1, r, max(i, m+1), j);
if (a.first > b.first) return a;
return b;
}
void change(int i, int v) { change(1, 0, n-1, i, v); }
int idx() { return Max(1, 0, n-1, 0, n-1).second; }
};
vector<int> LeonardoStrategy(int *C, int N, int K) {
vector<int> last_pos(N, N);
vector<int> next_pos(N);
for (int i = N-1; i >= 0; --i) {
next_pos[i] = last_pos[C[i]];
last_pos[C[i]] = i;
}
vector<int> pos_on_scaffold(N, -1);
for (int i = 0; i < K; ++i) pos_on_scaffold[i] = i;
vector<int> scaffold(K);
vector<int> next(K);
for (int i = 0; i < K; ++i) {
next[i] = last_pos[i];
scaffold[i] = i;
}
Segtree Scaffold(next);
vector<int> optimal_strategy;
for (int i = 0; i < N; ++i) {
if (pos_on_scaffold[C[i]] != -1) continue;
else {
int idx = Scaffold.idx();
optimal_strategy.pb(idx);
Scaffold.change(idx, next_pos[i]);
pos_on_scaffold[scaffold[idx]] = -1;
pos_on_scaffold[C[i]] = idx;
scaffold[idx] = C[i];
}
}
return optimal_strategy;
}
void ComputeAdvice(int *C, int N, int K, int M) {
vector<int> optimal_strategy = LeonardoStrategy(C, N, K);
int log_k = 0;
while ((1<<(log_k+1) <= K)) ++log_k;
for (int i : optimal_strategy) {
for (int j = log_k; j >= 0; --j) {
WriteAdvice((i&(1<<j))>0);
}
}
}
#include "assistant.h"
#include <bits/stdc++.h>
using namespace std;
void Assist(unsigned char *A, int N, int K, int R) {
vector<int> scaffold(K);
vector<int> pos_on_scaffold(N, -1);
for (int i = 0; i < K; ++i) {
scaffold[i] = i;
pos_on_scaffold[i] = i;
}
int log_k = 0;
while (1<<(log_k+1) <= K) ++log_k;
int j = 0;
for (int i = 0; i < N; ++i) {
int c = GetRequest();
if (pos_on_scaffold[c] != -1) continue;
int idx = 0;
for (int k = log_k; k >= 0; --k) {
idx |= (1<<k)*A[j];
++j;
}
PutBack(scaffold[idx]);
pos_on_scaffold[scaffold[idx]] = -1;
scaffold[idx] = c;
pos_on_scaffold[c] = idx;
}
}
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