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Submission #246889

# Submission time Handle Problem Language Result Execution time Memory
246889 2020-07-10T13:31:49 Z eriksuenderhauf Toll (BOI17_toll) C++11
100 / 100
 986 ms 99556 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 k:adj[node]){
        if(visited[k.f]==1){
            continue;
        }
        topsort(k.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++)
  //   sort(adj[i].begin(), adj[i].end());
  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<k;a++){
          next[a] = min(next[a],dist[q*k+j][k*jump[k]+a-j]+currdist[j]);
        }
      }
      // swap(currdist, next);
      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:67:16: 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 666 ms 97904 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 17 ms 4224 KB Output is correct
6 Correct 18 ms 4208 KB Output is correct
7 Correct 21 ms 4172 KB Output is correct
8 Correct 705 ms 95820 KB Output is correct
9 Correct 895 ms 95548 KB Output is correct
10 Correct 432 ms 93404 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 731 ms 97140 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 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 4352 KB Output is correct
9 Correct 629 ms 95860 KB Output is correct
10 Correct 844 ms 99556 KB Output is correct
11 Correct 727 ms 98176 KB Output is correct
12 Correct 953 ms 96112 KB Output is correct
13 Correct 593 ms 63436 KB Output is correct
14 Correct 501 ms 60772 KB Output is correct
15 Correct 561 ms 60076 KB Output is correct
16 Correct 561 ms 60000 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 7 ms 2304 KB Output is correct
3 Correct 7 ms 2304 KB Output is correct
4 Correct 6 ms 2304 KB Output is correct
5 Correct 6 ms 2304 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 4352 KB Output is correct
9 Correct 20 ms 4344 KB Output is correct
10 Correct 551 ms 95644 KB Output is correct
11 Correct 688 ms 97456 KB Output is correct
12 Correct 791 ms 98928 KB Output is correct
13 Correct 759 ms 99316 KB Output is correct
14 Correct 813 ms 97652 KB Output is correct
15 Correct 528 ms 59768 KB Output is correct
16 Correct 543 ms 59640 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 7 ms 2304 KB Output is correct
3 Correct 7 ms 2304 KB Output is correct
4 Correct 6 ms 2304 KB Output is correct
5 Correct 6 ms 2304 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 4352 KB Output is correct
9 Correct 20 ms 4344 KB Output is correct
10 Correct 551 ms 95644 KB Output is correct
11 Correct 688 ms 97456 KB Output is correct
12 Correct 791 ms 98928 KB Output is correct
13 Correct 759 ms 99316 KB Output is correct
14 Correct 813 ms 97652 KB Output is correct
15 Correct 528 ms 59768 KB Output is correct
16 Correct 543 ms 59640 KB Output is correct
17 Correct 736 ms 97692 KB Output is correct
18 Correct 6 ms 2304 KB Output is correct
19 Correct 6 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 2432 KB Output is correct
23 Correct 19 ms 4352 KB Output is correct
24 Correct 18 ms 4344 KB Output is correct
25 Correct 21 ms 4352 KB Output is correct
26 Correct 20 ms 4352 KB Output is correct
27 Correct 622 ms 95524 KB Output is correct
28 Correct 823 ms 99112 KB Output is correct
29 Correct 936 ms 99448 KB Output is correct
30 Correct 852 ms 97396 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 666 ms 97904 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 17 ms 4224 KB Output is correct
6 Correct 18 ms 4208 KB Output is correct
7 Correct 21 ms 4172 KB Output is correct
8 Correct 705 ms 95820 KB Output is correct
9 Correct 895 ms 95548 KB Output is correct
10 Correct 432 ms 93404 KB Output is correct
11 Correct 731 ms 97140 KB Output is correct
12 Correct 6 ms 2304 KB Output is correct
13 Correct 6 ms 2304 KB Output is correct
14 Correct 6 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 4352 KB Output is correct
19 Correct 629 ms 95860 KB Output is correct
20 Correct 844 ms 99556 KB Output is correct
21 Correct 727 ms 98176 KB Output is correct
22 Correct 953 ms 96112 KB Output is correct
23 Correct 593 ms 63436 KB Output is correct
24 Correct 501 ms 60772 KB Output is correct
25 Correct 561 ms 60076 KB Output is correct
26 Correct 561 ms 60000 KB Output is correct
27 Correct 6 ms 2304 KB Output is correct
28 Correct 7 ms 2304 KB Output is correct
29 Correct 7 ms 2304 KB Output is correct
30 Correct 6 ms 2304 KB Output is correct
31 Correct 6 ms 2304 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 4352 KB Output is correct
35 Correct 20 ms 4344 KB Output is correct
36 Correct 551 ms 95644 KB Output is correct
37 Correct 688 ms 97456 KB Output is correct
38 Correct 791 ms 98928 KB Output is correct
39 Correct 759 ms 99316 KB Output is correct
40 Correct 813 ms 97652 KB Output is correct
41 Correct 528 ms 59768 KB Output is correct
42 Correct 543 ms 59640 KB Output is correct
43 Correct 736 ms 97692 KB Output is correct
44 Correct 6 ms 2304 KB Output is correct
45 Correct 6 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 2432 KB Output is correct
49 Correct 19 ms 4352 KB Output is correct
50 Correct 18 ms 4344 KB Output is correct
51 Correct 21 ms 4352 KB Output is correct
52 Correct 20 ms 4352 KB Output is correct
53 Correct 622 ms 95524 KB Output is correct
54 Correct 823 ms 99112 KB Output is correct
55 Correct 936 ms 99448 KB Output is correct
56 Correct 852 ms 97396 KB Output is correct
57 Correct 986 ms 98964 KB Output is correct
58 Correct 670 ms 95092 KB Output is correct
59 Correct 745 ms 97264 KB Output is correct