제출 #1020360

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1020360		adaawf	Untitled (POI11_rot)	C++17	0 / 100	1079 ms	53588 KiB

Main

#include <iostream>
#include <vector>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
int c = 1, a[400005];
vector<int> g[400005];
ordered_set s[400005];
void trya() {
    int h = c, w;
    cin >> w;
    if (w == 0) {
        c++;
        trya();
        c++;
        trya();
        g[h].push_back(h + 1);
        g[h].push_back(h + 2);
    }
    else a[h] = w;
}
long long int dfs(int x) {
    if (g[x].size() == 0) {
        s[x].insert(a[x]);
        return 0;
    }
    long long int res = 0, c = 0, h = 1;
    for (int w : g[x]) {
        c += dfs(w);
        h *= s[w].size();
        int flag = 0;
        if (s[w].size() > s[x].size()) {
            swap(s[w], s[x]);
            flag = 1;
        }
        for (int v : s[w]) {
            if (flag == 1) res += s[x].order_of_key(v);
            else res += s[x].size() - s[x].order_of_key(v);
        }
        for (int v : s[w]) {
            s[x].insert(v);
        }
    }
    return min(res, h - res) + c;
}
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n;
    cin >> n;
    trya();
    cout << dfs(1);
}

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