Submission #719076

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
719076	2023-04-05 09:57:47	esomer	Fancy Fence (CEOI20_fancyfence)	C++17	100 / 100	44 ms	6004 KiB

fancyfence

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#include<bits/stdc++.h>
 
using namespace std;
 
#define endl "\n"
typedef long long int ll;
 
const int MOD = 1e9 + 7;
struct DSU{
  vector<int> v;
  vector<ll> sum;
  void init(vector<tuple<ll, ll, int>>& a){
    int n = (int)a.size();
    v.assign(n, -1);
    sum.assign(n, 0);
    for(int i = 0; i < n; i++){
      sum[get<2>(a[i])] = get<1>(a[i]);
    }
  }
  int gt(int x){return v[x] < 0 ? x : v[x] = gt(v[x]);}
  ll gets(int x){return sum[gt(x)] % MOD;}
  void unite(int x, int y){
    x = gt(x); y = gt(y);
    if(x == y) return;
    if(v[x] > v[y]) swap(x, y);
    v[x] += v[y]; v[y] = x; sum[x] += sum[y]; sum[x] %= MOD;
  }
};
 
 
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