oj.uz

Submission #246890

# Submission time Handle Problem Language Result Execution time Memory
246890 2020-07-10T13:32:41 Z eriksuenderhauf Toll (BOI17_toll) C++11
100 / 100
 1102 ms 98548 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define f first
#define s second
#define sqrtn 230
#define maxn 50050
#define mxdist 500000000
vector<int> jump = {0,228,112,74,45,44};
int dist[maxn][231];
int k,no_of_vertex,no_of_edge,no_of_query;
vector<int> top;
vector<int> visited(maxn,0);
vector<vector<pair<int,int> > > adj(maxn);
vector<int> ipos(maxn,0);
void topsort(int node){
  visited[node] = 1;
  for(auto kk:adj[node]){
    if(visited[kk.f]==1){
      continue;
    }
    topsort(kk.f);
  }
  top.push_back(node);
}
void find(int node){
  vector<pair<int,int> > curr;
  vector<int> distt(231,INT_MAX);
  for(int i=node;i<min(no_of_vertex,node+231);i++){
    curr.push_back({ipos[i],i});
  }
  distt[0] = 0;
  sort(curr.begin(),curr.end());
  for(int i=0;i<curr.size();i++){
    for(auto kk:adj[curr[i].s]){
      if(kk.f>node+230){
        continue;
      }
      distt[kk.f-node] = min(distt[kk.f-node],distt[curr[i].s-node]+kk.s);
    }
  }
  for(int i=0;i<231;i++){
    dist[node][i] = INT_MAX;
  }
  for(int i=0;i<curr.size();i++){
    dist[node][i] = distt[i];
  }
  return;
}
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);cout.tie(0);
  cin >> k >> no_of_vertex >> no_of_edge >> no_of_query;
  int input1,input2,input3;
  for(int i=0;i<no_of_edge;i++){
    cin >> input1 >> input2 >> input3;
    adj[input1].push_back({input2,input3});
  }
  for(int i=0;i<no_of_vertex;i++){
    if(visited[i]==0){
      topsort(i);
    }
  }
  reverse(top.begin(),top.end());
  for(int i=0;i<top.size();i++){
    ipos[top[i]] = i;
  }
  for(int i=0;i<no_of_vertex;i++){
    find(i);
  }
  for(int i=0;i<no_of_query;i++){
    cin >> input1 >> input2;
    vector<int> currdist(k,INT_MAX);
    if(input1+230>=input2){
      if(dist[input1][input2-input1]>=INT_MAX){
        cout << -1 << "\n";
      }
      else{
        cout << dist[input1][input2-input1] << "\n";
      }
      continue;
    }
    int q = input1/k;
    q++;
    for(int j=0;j<k;j++){
      currdist[j] = dist[input1][q*k+j-input1];
    }
    while(1){
      if(q*k+230>=input2){
        int mini = INT_MAX;
        for(int j=0;j<k;j++){
          mini = min(mini,dist[q*k+j][input2-q*k-j]+currdist[j]);
        }
        if(mini==INT_MAX){
          cout << -1 << "\n";
        }
        else{
          cout << mini << "\n";
        }
        break;
      }
      vector<int> next(k,INT_MAX);
      for(int j=0;j<k;j++){
        /*for(int a=0;a<no_of_vertex;a++){
              cout << dist[q*k+j][a] << " ";
            }
            cout << "\n-----------\n";*/
        for(int a=0;a<k;a++){
          //cout << dist[q*k+j][k*jump[k]+a] << "---\n";
          //cout << j << " " << a << " " << dist[q*k+j][k*jump[k]+a-j] << " " << currdist[j] << " " << k*jump[k]+a << "\n";
          next[a] = min(next[a],dist[q*k+j][k*jump[k]+a-j]+currdist[j]);
        }
      }
      /*for(int j=0;j<k;j++){
            cout << next[j] << " ";
          }
          cout << "\n-----\n";*/
      /*cout << q*k << "\n";
          for(auto kk:next){
            cout << kk << " ";
          }
          cout << endl;*/
      currdist = next;
      q += jump[k];
    }
  }

}

Compilation message

toll.cpp: In function 'void find(long long int)':
toll.cpp:34:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<curr.size();i++){
               ~^~~~~~~~~~~~
toll.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<curr.size();i++){
               ~^~~~~~~~~~~~
toll.cpp: In function 'int32_t main()':
toll.cpp:65:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<top.size();i++){
               ~^~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 612 ms 97268 KB Output is correct
2 Correct 6 ms 2304 KB Output is correct
3 Correct 6 ms 2304 KB Output is correct
4 Correct 7 ms 2304 KB Output is correct
5 Correct 17 ms 4224 KB Output is correct
6 Correct 17 ms 4224 KB Output is correct
7 Correct 18 ms 4224 KB Output is correct
8 Correct 632 ms 95052 KB Output is correct
9 Correct 761 ms 94696 KB Output is correct
10 Correct 417 ms 93300 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 734 ms 96476 KB Output is correct
2 Correct 5 ms 2304 KB Output is correct
3 Correct 6 ms 2432 KB Output is correct
4 Correct 8 ms 2304 KB Output is correct
5 Correct 6 ms 2304 KB Output is correct
6 Correct 7 ms 2304 KB Output is correct
7 Correct 20 ms 4224 KB Output is correct
8 Correct 22 ms 4244 KB Output is correct
9 Correct 595 ms 95052 KB Output is correct
10 Correct 855 ms 98032 KB Output is correct
11 Correct 727 ms 97096 KB Output is correct
12 Correct 903 ms 95344 KB Output is correct
13 Correct 575 ms 62068 KB Output is correct
14 Correct 471 ms 60028 KB Output is correct
15 Correct 578 ms 59280 KB Output is correct
16 Correct 550 ms 59388 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 2304 KB Output is correct
2 Correct 6 ms 2304 KB Output is correct
3 Correct 6 ms 2304 KB Output is correct
4 Correct 6 ms 2304 KB Output is correct
5 Correct 6 ms 2432 KB Output is correct
6 Correct 17 ms 4224 KB Output is correct
7 Correct 17 ms 4224 KB Output is correct
8 Correct 21 ms 4472 KB Output is correct
9 Correct 20 ms 4224 KB Output is correct
10 Correct 571 ms 95092 KB Output is correct
11 Correct 700 ms 97012 KB Output is correct
12 Correct 765 ms 98032 KB Output is correct
13 Correct 748 ms 98420 KB Output is correct
14 Correct 813 ms 97268 KB Output is correct
15 Correct 532 ms 59256 KB Output is correct
16 Correct 535 ms 59256 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 2304 KB Output is correct
2 Correct 6 ms 2304 KB Output is correct
3 Correct 6 ms 2304 KB Output is correct
4 Correct 6 ms 2304 KB Output is correct
5 Correct 6 ms 2432 KB Output is correct
6 Correct 17 ms 4224 KB Output is correct
7 Correct 17 ms 4224 KB Output is correct
8 Correct 21 ms 4472 KB Output is correct
9 Correct 20 ms 4224 KB Output is correct
10 Correct 571 ms 95092 KB Output is correct
11 Correct 700 ms 97012 KB Output is correct
12 Correct 765 ms 98032 KB Output is correct
13 Correct 748 ms 98420 KB Output is correct
14 Correct 813 ms 97268 KB Output is correct
15 Correct 532 ms 59256 KB Output is correct
16 Correct 535 ms 59256 KB Output is correct
17 Correct 707 ms 97012 KB Output is correct
18 Correct 6 ms 2304 KB Output is correct
19 Correct 5 ms 2304 KB Output is correct
20 Correct 5 ms 2304 KB Output is correct
21 Correct 6 ms 2304 KB Output is correct
22 Correct 6 ms 2304 KB Output is correct
23 Correct 18 ms 4224 KB Output is correct
24 Correct 18 ms 4224 KB Output is correct
25 Correct 22 ms 4224 KB Output is correct
26 Correct 21 ms 4224 KB Output is correct
27 Correct 585 ms 95092 KB Output is correct
28 Correct 785 ms 98008 KB Output is correct
29 Correct 784 ms 98548 KB Output is correct
30 Correct 863 ms 96892 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 612 ms 97268 KB Output is correct
2 Correct 6 ms 2304 KB Output is correct
3 Correct 6 ms 2304 KB Output is correct
4 Correct 7 ms 2304 KB Output is correct
5 Correct 17 ms 4224 KB Output is correct
6 Correct 17 ms 4224 KB Output is correct
7 Correct 18 ms 4224 KB Output is correct
8 Correct 632 ms 95052 KB Output is correct
9 Correct 761 ms 94696 KB Output is correct
10 Correct 417 ms 93300 KB Output is correct
11 Correct 734 ms 96476 KB Output is correct
12 Correct 5 ms 2304 KB Output is correct
13 Correct 6 ms 2432 KB Output is correct
14 Correct 8 ms 2304 KB Output is correct
15 Correct 6 ms 2304 KB Output is correct
16 Correct 7 ms 2304 KB Output is correct
17 Correct 20 ms 4224 KB Output is correct
18 Correct 22 ms 4244 KB Output is correct
19 Correct 595 ms 95052 KB Output is correct
20 Correct 855 ms 98032 KB Output is correct
21 Correct 727 ms 97096 KB Output is correct
22 Correct 903 ms 95344 KB Output is correct
23 Correct 575 ms 62068 KB Output is correct
24 Correct 471 ms 60028 KB Output is correct
25 Correct 578 ms 59280 KB Output is correct
26 Correct 550 ms 59388 KB Output is correct
27 Correct 6 ms 2304 KB Output is correct
28 Correct 6 ms 2304 KB Output is correct
29 Correct 6 ms 2304 KB Output is correct
30 Correct 6 ms 2304 KB Output is correct
31 Correct 6 ms 2432 KB Output is correct
32 Correct 17 ms 4224 KB Output is correct
33 Correct 17 ms 4224 KB Output is correct
34 Correct 21 ms 4472 KB Output is correct
35 Correct 20 ms 4224 KB Output is correct
36 Correct 571 ms 95092 KB Output is correct
37 Correct 700 ms 97012 KB Output is correct
38 Correct 765 ms 98032 KB Output is correct
39 Correct 748 ms 98420 KB Output is correct
40 Correct 813 ms 97268 KB Output is correct
41 Correct 532 ms 59256 KB Output is correct
42 Correct 535 ms 59256 KB Output is correct
43 Correct 707 ms 97012 KB Output is correct
44 Correct 6 ms 2304 KB Output is correct
45 Correct 5 ms 2304 KB Output is correct
46 Correct 5 ms 2304 KB Output is correct
47 Correct 6 ms 2304 KB Output is correct
48 Correct 6 ms 2304 KB Output is correct
49 Correct 18 ms 4224 KB Output is correct
50 Correct 18 ms 4224 KB Output is correct
51 Correct 22 ms 4224 KB Output is correct
52 Correct 21 ms 4224 KB Output is correct
53 Correct 585 ms 95092 KB Output is correct
54 Correct 785 ms 98008 KB Output is correct
55 Correct 784 ms 98548 KB Output is correct
56 Correct 863 ms 96892 KB Output is correct
57 Correct 1102 ms 98288 KB Output is correct
58 Correct 640 ms 94964 KB Output is correct
59 Correct 742 ms 97136 KB Output is correct