Submission #6907915


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#include <bits/stdc++.h>
#define int long long
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define DEC(i, a, b) for (int i = (a); i > (b); --i)
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define pb push_back
#define ALL(obj) (obj).begin(), (obj).end()
#define debug(x) cerr << #x << ": " << x << '\n'
using namespace std;
typedef long long ll;
const int INF = (int)1e9;
const int MOD = (int)1e9 + 7;
const ll LINF = (int)1e18;
const double EPS = 1e-9;

const int MAX_V = (int)200;
int d[MAX_V][MAX_V]; // d[u][v]は辺(u,v)のコスト。0-origin. 初期化忘れずに
int V;

void warshall_floyd() {
  REP(k, V)
    REP(i, V)
      REP(j, V) d[i][j] = min(d[i][j], d[i][k] + d[k][j]);
}

signed main(){
  cin.tie(nullptr);
  ios::sync_with_stdio(false);

  int M,R;
  cin >> V >> M >> R;
  vector<int> r(R);
  REP(i,R) {
    cin >> r[i];
    --r[i];
  }
  sort(ALL(r));

  // 初期化
  REP(i, V) {
    fill(d[i], d[i] + V, LINF);
    d[i][i] = 0;
  }

  // コスト入力
  REP(i,M) {
    int a,b,c;
    cin >> a >> b >> c;
    --a; --b;
    // 有向・無向の区別注意
    d[a][b] = c;
    d[b][a] = c;
  }

  warshall_floyd();

  int ans = LINF;  
  do {
    int tmp = 0;
    REP(i,R-1) tmp += d[r[i]][r[i+1]];
    ans = min(ans,tmp);
  } while (next_permutation(ALL(r)));

  cout << ans << endl;
  return 0;
}

Submission Info

Submission Time
Task D - joisino's travel
User aximov
Language C++14 (GCC 5.4.1)
Score 400
Code Size 1402 Byte
Status AC
Exec Time 16 ms
Memory 640 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 3
AC × 11
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, sample_01.txt, sample_02.txt, sample_03.txt
Case Name Status Exec Time Memory
01.txt AC 16 ms 640 KB
02.txt AC 11 ms 640 KB
03.txt AC 11 ms 640 KB
04.txt AC 12 ms 640 KB
05.txt AC 12 ms 640 KB
06.txt AC 15 ms 512 KB
07.txt AC 16 ms 640 KB
08.txt AC 10 ms 512 KB
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB