結果
| 問題 | No.748 yuki国のお財布事情 |
| コンテスト | |
| ユーザー |
Konton7
|
| 提出日時 | 2020-03-06 15:08:22 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 166 ms / 2,000 ms |
| コード長 | 2,570 bytes |
| コンパイル時間 | 3,099 ms |
| コンパイル使用メモリ | 204,032 KB |
| 最終ジャッジ日時 | 2025-01-09 04:38:48 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using VI = vector<int>;
using VL = vector<ll>;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define allpt(v) (v).begin(), (v).end()
#define allpt_r(v) (v).rbegin(), (v).rend()
const int mod = 1e9 + 7;
const string wsp = " ";
const string tb = "\t";
const string rt = "\n";
template <typename T>
void show1dvec(vector<T> v)
{
int n = v.size() - 1;
rep(i, n) cout << v[i] << wsp;
cout << v[n] << rt;
return;
}
template <typename T>
void show2dvec(vector<vector<T>> v)
{
int n = v.size();
rep(i, n) show1dvec(v[i]);
}
class Unionfind
{
vector<int> p;
public:
int find(int x);
void unite(int x, int y);
Unionfind(int n);
};
Unionfind::Unionfind(int n)
{
for (int i = 0; i < n; i++)
{
p.push_back(i);
}
}
int Unionfind::find(int x)
{
while (p[x] != x)
{
p[x] = p[p[x]];
x = p[x];
}
return x;
}
void Unionfind::unite(int x, int y)
{
x = Unionfind::find(x);
y = Unionfind::find(y);
if (x != y)
{
p[x] = y;
}
}
struct road
{
int cost;
int from;
int to;
};
int main()
{
#ifdef DEBUG
cout << "DEBUG MODE" << endl;
ifstream in("input.txt"); //for debug
cin.rdbuf(in.rdbuf()); //for debug
#endif
int n, m, k, a, b, c;
ll total_cost = 0, remain_cost = 0;
cin >> n >> m >> k;
vector<road> roads(m), sp_roads, ord_roads;
vector<bool> sp_or_ord(m, false);
Unionfind cities(n);
rep(i, m)
{
cin >> a >> b >> c;
roads[i] = (road){c, a - 1, b - 1};
total_cost += c;
}
rep(i, k)
{
cin >> c;
sp_or_ord[c - 1] = true;
}
rep(i, m)
{
if (sp_or_ord[i])
sp_roads.push_back(roads[i]);
else
ord_roads.push_back(roads[i]);
}
rep(i, k)
{
cities.unite(sp_roads[i].from, sp_roads[i].to);
remain_cost += sp_roads[i].cost;
}
sort(allpt(ord_roads), [](const road &a, const road &b) { if (a.cost != b.cost) return a.cost < b.cost; else return a.from < b.from; });
for (auto z : ord_roads)
{
if (cities.find(z.from) != cities.find(z.to))
{
cities.unite(z.from, z.to);
remain_cost += z.cost;
}
}
cout << total_cost - remain_cost << rt;
return 0;
}
Konton7