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 <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>
using namespace std;
using namespace __gnu_pbds;
template<class C>constexpr int len(const C&c){return int(c.size());}
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
const int MAXN = 200005;
int N; long long ans, bit[MAXN];
void update(int pos, int val){
for(int i = pos; i <= N; i += i & -i) bit[i] += val;
}
long long query(int pos){
long long tot = 0;
for(int i = pos; i > 0; i -= i & -i) tot += bit[i];
return tot;
}
vector<int> solve(){
int A; cin >> A;
if(A != 0){
update(A, 1);
return {A};
}
vector<int> left = solve(), right = solve();
if(len(left) > len(right)) swap(left, right);
memset(bit, 0, sizeof(bit));
long long cur, case1 = 0, case2 = 0;
for(auto i : right) update(i, 1);
for(auto i : left){
cur = query(i - 1);
case1 += cur;
case2 += len(right) - cur;
}
ans += min(case1, case2);
for(auto i : left) update(i, 1), right.push_back(i);
return right;
}
int main(){
cin.sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> N; vector<int> arr = solve();
cout << ans << '\n';
return 0;
}
Compilation message (stderr)
File "rot.py", line 5
using namespace std;
^
SyntaxError: invalid syntax
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