Submission #298035

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
298035	2020-09-12 10:02:59	miss_robot	Toll (BOI17_toll)	C++14	100 / 100	264 ms	73596 KiB

toll

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#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
using namespace std;
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);
  int k, n, m, o, L = 16, INF = numeric_limits<int>::max()/8;
  cin >> k >> n >> m >> o;
  vector< vector< vector< vector<int> > > > g(L, vector< vector< vector<int> > >((n+k-1)/k, vector< vector<int> >(k, vector<int>(k, INF))));
  while(m--){
    int a, b, t;
    cin >> a >> b >> t;
    g[0][a/k][a%k][b%k] = t;
  }
  for(int i = 1; i < L; i++)
    for(int j = 0; j < (n+k-1)/k-(1<<i); j++)
      for(int u = 0; u < k; u++)
        for(int v = 0; v < k; v++)
          for(int w = 0; w < k; w++)
        g[i][j][u][v] = min(g[i][j][u][v], g[i-1][j][u][w]+g[i-1][j+(1<<(i-1))][w][v]);
  while(o--){
    int a, b, pos;
    cin >> a >> b;
    if(a/k == b/k){
      cout << "-1\n";
      continue;
 
 
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• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 44 / 44