Submission #947433

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
947433	2024-03-16 07:13:39	weakweakweak	수도 (JOI20_capital_city)	C++17	30 / 100	180 ms	94932 KiB

capital_city

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//好吧，我很笨
#include <bits/stdc++.h>
using namespace std;
int lt[510000], rt[510000], cnt[510000], n, k, col[510000], revlt[510000], now = 0, l[510000], r[510000];
int pos[510000] = {0};
vector<int> e[510000];
vector<int> qs[510000];
set<int> st[510000];
int a[510000] = {0};
void update (int i, int val) {
    for (; i <= n; i += i & -i) a[i] += val;
}
int query (int i) {
    int res = 0;
    for (; i > 0; i -= i & -i) res += a[i];
    return res;
}
int query2 (int l, int r) {return query(r) - query(l - 1);}
void dfs (int i, int par) {
    lt[i] = ++now, revlt[now] = i;
    for (int j : e[i]) if (j != par) dfs(j, i);
    rt[i] = now;
}
 
 
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