#include <bits/stdc++.h>
#include "bubblesort2.h"
using namespace std;
#define fast ios::sync_with_stdio(0);cin.tie(0);
#define s second
#define f first
typedef long long ll;
const ll MOD = 1e9+9;
const ll LOGN = 20;
const ll MAXN = 1e6 + 100;
vector<int> cc;
int index(int k) {
return upper_bound(cc.begin(), cc.end(), k) - cc.begin();
}
int sg[4*MAXN], lazy[4*MAXN];
void push(int k, int a, int b) {
if (lazy[k]) {
sg[k] += lazy[k];
if (a != b) {
lazy[2*k] += lazy[k];
lazy[2*k+1] += lazy[k];
}
return ;
}
}
void init(int k, int a, int b) {
if (a == b) {
sg[k] = -1e7;
return ;
}
init(2*k, a, (a+b)/2);
init(2*k+1, (a+b)/2+1, b);
sg[k] = max(sg[2*k], sg[2*k+1]);
}
void update(int k, int a, int b, int q_l, int q_r, int val) {
push(k, a, b);
if (b < q_l || a > q_r)
return ;
if (q_l <= a && b <= q_r) {
lazy[k] += val;
push(k, a, b);
return ;
}
update(2*k, a, (a+b)/2, q_l, q_r, val);
update(2*k+1, (a+b)/2+1, b, q_l, q_r, val);
sg[k] = max(sg[2*k], sg[2*k+1]);
}
int query(int k, int a, int b, int q_l, int q_r) {
push(k, a, b);
if (b < q_l || a > q_r)
return 0;
if (q_l <= a && b <= q_r)
return sg[k];
return max(query(2*k, a, (a+b)/2, q_l, q_r), query(2*k+1, (a+b)/2+1, b, q_l, q_r));
}
vector<int> countScans(vector<int> A, vector<int> X, vector<int> V) {
int n = A.size();
int q = X.size();
for (auto u : A)
cc.push_back(u);
for (auto u : V)
cc.push_back(u);
sort(cc.begin(), cc.end());
cc.erase(unique(cc.begin(), cc.end()), cc.end());
for (int i = 0; i < n; i++)
A[i] = index(A[i]);
for (int i = 0; i < q; i++)
V[i] = index(V[i]);
int N = cc.size();
init(1, 1, N);
for (int i = 0; i < n; i++) {
int Q = query(1, 1, N, A[i], A[i]);
update(1, 1, N, A[i], A[i], -Q);
update(1, 1, N, A[i], A[i], i);
update(1, 1, N, A[i] + 1, N, -1);
}
vector<int> res;
for (int i = 0; i < q; i++) {
int plc = X[i];
int Q = query(1, 1, N, A[plc], A[plc]);
update(1, 1, N, A[plc], A[plc], - (Q + 1e7));
update(1, 1, N, A[plc] + 1, N, 1);
A[plc] = V[i];
int Q = query(1, 1, N, A[plc], A[plc]);
update(1, 1, N, A[plc], A[plc], -Q);
update(1, 1, N, A[plc], A[plc], plc);
update(1, 1, N, A[plc] + 1, N, -1);
push(1, 1, N);
res.push_back(sg[1]);
}
return res;
}
Compilation message
bubblesort2.cpp: In function 'std::vector<int> countScans(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:96:7: error: redeclaration of 'int Q'
96 | int Q = query(1, 1, N, A[plc], A[plc]);
| ^
bubblesort2.cpp:91:7: note: 'int Q' previously declared here
91 | int Q = query(1, 1, N, A[plc], A[plc]);
| ^
