#include <bits/stdc++.h>
#define pb emplace_back
#define get_pos(u,x) (lower_bound(begin(u),end(u),x) - begin(u))
using namespace std;
void calc(int l, int m, int r) {
//for(int i = )
}
void CDQ(vector<tuple<int,int,int>> evt) {
for(int s = 1; s < evt.size(); s *= 2) {
for(int i = 0; i+s < evt.size(); i++) {
int j = min(int(evt.size()), i+s*2);
//calc(evt, i, i+s, j);
}
}
}
vector<int> countScan(vector<int> A, vector<int> X, vector<int> V) {
int n = A.size(), q = X.size();
//vector<tuple<int,int,int>> evt;
/*for(int i = 0; i < n; i++)
evt.pb(i, i, A[i]);
for(int i = 0; i < q; i++)
evt.pb(i+n, X[i]-1, V[i]);
CDQ(evt);*/
vector<int> u;
for(int i = 0; i < n; i++) u.pb(A[i]);
for(int i = 0; i < q; i++) u.pb(V[i]);
sort(u.begin(), u.end());
u.erase(unique(u.begin(), u.end()), u.end());
for(int i = 0; i < n; i++) A[i] = get_pos(u, A[i]);
for(int i = 0; i < q; i++) V[i] = get_pos(u, V[i]);
vector<int> cnt(u.size()+2);
auto modify = [&](int p, int d) {
for(; p < cnt.size(); p += p&-p) cnt[p] += d;
};
auto query = [&](int p) {
int res = 0;
for(; p; p -= p&-p) res += cnt[p];
return res;
};
vector<int> Q;
for(int i = 0; i < q; i++) {
A[X[i]-1] = V[i];
int ans = 0;
for(int i = n-1; i >= 0; i--) {
modify(A[i], 1);
ans = max(ans, query(A[i]-1));
}
Q.pb(ans);
}
}
Compilation message
bubblesort2.cpp: In function 'void CDQ(std::vector<std::tuple<int, int, int> >)':
bubblesort2.cpp:10:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int s = 1; s < evt.size(); s *= 2) {
~~^~~~~~~~~~~~
bubblesort2.cpp:11:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i+s < evt.size(); i++) {
~~~~^~~~~~~~~~~~
bubblesort2.cpp:12:17: warning: unused variable 'j' [-Wunused-variable]
int j = min(int(evt.size()), i+s*2);
^
bubblesort2.cpp: In lambda function:
bubblesort2.cpp:34:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(; p < cnt.size(); p += p&-p) cnt[p] += d;
~~^~~~~~~~~~~~
bubblesort2.cpp: In function 'std::vector<int> countScan(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:51:1: warning: no return statement in function returning non-void [-Wreturn-type]
}
^
/tmp/ccjElO5a.o: In function `main':
grader.cpp:(.text.startup+0x12b): undefined reference to `countScans(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status
