Submission #961806

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
961806	2024-04-12 13:31:20	starchan	Fancy Fence (CEOI20_fancyfence)	C++17	100 / 100	36 ms	8444 KiB

fancyfence

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#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in array<int, 2>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
const int mod = 1e9+7;
const int MX = 1e5+5;
int c2(int x)
{
  return ((x*(x+1))/2)%mod;
}
int sum;
vector<int> pa(MX, -1);
vector<int> dp(MX, 0);
int leader(int u)
{
  if(pa[u] < 0)
    return u;
  else
    return pa[u] = leader(pa[u]);
}
 
 
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