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Submission #450613

# Submission time Handle Problem Language Result Execution time Memory
450613 2021-08-03T03:15:08 Z czhang2718 Toll (BOI17_toll) C++14
100 / 100
 723 ms 47112 KB 
#include<bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i=a; i<=b; i++)
#define trav(x, a) for(auto &x:a)
#define all(x) x.begin(), x.end()
#define f first
#define s second
#define nl '\n'
#define pb push_back
typedef vector<int> vi;
typedef pair<int, int> pii;

int n, m, k, q;
vector<pii> adj[50006];
vector<pii> radj[50006];
int lx[10006];
int rx[10006];
int ans[10006];
map<pii, int> edge;

vector<vi> calc(int l, int r, vi &qu){
  vector<vi> vec(k*(r-l+1), vi(2*k));
  if(r-l==1){
    rep(i, 0, k-1){
      rep(j, 0, k-1){
        int t=edge[{l*k+i, r*k+j}];
        vec[i][k+j]=vec[k+j][i]=(t?t:1e9);
      }
    }
    trav(i, qu){
      if(edge[{lx[i], rx[i]}]) ans[i]=edge[{lx[i], rx[i]}];
      else ans[i]=1e9;
    }
    return vec;
  }
  int m=(l+r)/2;
  vi lq, rq;
  trav(i, qu){
    if(rx[i]/k<m) lq.pb(i);
    if(lx[i]/k>m) rq.pb(i);
  }
  vector<vi> lvec=calc(l, m, lq);
  vector<vi> rvec=calc(m, r, rq);

  trav(i, qu){
    if(rx[i]/k<m || lx[i]/k>m) continue;
    if(rx[i]/k==m){
      ans[i]=lvec[lx[i]-l*k][k+rx[i]%k]; continue;
    }
    if(lx[i]/k==m){
      ans[i]=rvec[rx[i]-m*k][lx[i]%k]; continue;
    }
    ans[i]=1e9;
    rep(j, 0, k-1){
      ans[i]=min(ans[i], lvec[lx[i]-l*k][k+j]+rvec[rx[i]-m*k][j]);
    }
  }

  rep(i, l*k, m*k+k-1){
    rep(j, 0, k-1){
      vec[i-l*k][j]=lvec[i-l*k][j];
    }
  }
  rep(i, m*k, r*k+k-1){
    rep(j, k, 2*k-1){
      vec[i-l*k][j]=rvec[i-m*k][j];
    }
  }

  rep(i, (m+1)*k, r*k+k-1){
    rep(j, 0, k-1){
      vec[i-l*k][j]=1e9; 
      trav(p, radj[i]) vec[i-l*k][j]=min(vec[i-l*k][j], vec[p.f-l*k][j]+p.s);
    }
  }

  for(int i=m*k-1; i>=l*k; i--){
    rep(j, 0, k-1){
      vec[i-l*k][j+k]=1e9;
      trav(p, adj[i]) vec[i-l*k][j+k]=min(vec[i-l*k][j+k], vec[p.f-l*k][j+k]+p.s);
    }
  }
  return vec;
}

int main(){
  cin.tie(0)->sync_with_stdio(0);
  // freopen("input.txt", "r", stdin);
  // freopen("output.txt", "w", stdout);

  cin >> k >> n >> m >> q;
  rep(i, 1, m){
    int a, b, t; cin >> a >> b >> t;
    adj[a].pb({b, t});
    radj[b].pb({a, t});
    edge[{a, b}]=edge[{b, a}]=t;
  }

  vi qu;
  rep(i, 1, q){
    cin >> lx[i] >> rx[i];
    qu.pb(i);
  }
  calc(0, (n-1)/k, qu);

  rep(i, 1, q) cout << (ans[i]==1e9?-1:(lx[i]/k==rx[i]/k?-1:ans[i])) << nl;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 20488 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 4 ms 3020 KB Output is correct
6 Correct 5 ms 3000 KB Output is correct
7 Correct 5 ms 3020 KB Output is correct
8 Correct 180 ms 20488 KB Output is correct
9 Correct 189 ms 20120 KB Output is correct
10 Correct 100 ms 14216 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 26324 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 8 ms 3196 KB Output is correct
8 Correct 9 ms 3404 KB Output is correct
9 Correct 189 ms 21252 KB Output is correct
10 Correct 505 ms 35496 KB Output is correct
11 Correct 344 ms 28388 KB Output is correct
12 Correct 317 ms 29468 KB Output is correct
13 Correct 575 ms 35436 KB Output is correct
14 Correct 309 ms 23400 KB Output is correct
15 Correct 304 ms 27048 KB Output is correct
16 Correct 314 ms 27028 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 4 ms 3020 KB Output is correct
7 Correct 5 ms 3148 KB Output is correct
8 Correct 11 ms 3628 KB Output is correct
9 Correct 8 ms 3532 KB Output is correct
10 Correct 186 ms 21060 KB Output is correct
11 Correct 329 ms 27732 KB Output is correct
12 Correct 489 ms 35328 KB Output is correct
13 Correct 552 ms 36956 KB Output is correct
14 Correct 419 ms 32820 KB Output is correct
15 Correct 305 ms 26888 KB Output is correct
16 Correct 307 ms 26944 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 4 ms 3020 KB Output is correct
7 Correct 5 ms 3148 KB Output is correct
8 Correct 11 ms 3628 KB Output is correct
9 Correct 8 ms 3532 KB Output is correct
10 Correct 186 ms 21060 KB Output is correct
11 Correct 329 ms 27732 KB Output is correct
12 Correct 489 ms 35328 KB Output is correct
13 Correct 552 ms 36956 KB Output is correct
14 Correct 419 ms 32820 KB Output is correct
15 Correct 305 ms 26888 KB Output is correct
16 Correct 307 ms 26944 KB Output is correct
17 Correct 320 ms 27900 KB Output is correct
18 Correct 2 ms 2636 KB Output is correct
19 Correct 2 ms 2636 KB Output is correct
20 Correct 2 ms 2676 KB Output is correct
21 Correct 2 ms 2636 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 5 ms 3148 KB Output is correct
24 Correct 6 ms 3196 KB Output is correct
25 Correct 10 ms 3660 KB Output is correct
26 Correct 9 ms 3660 KB Output is correct
27 Correct 176 ms 21160 KB Output is correct
28 Correct 495 ms 35236 KB Output is correct
29 Correct 545 ms 37084 KB Output is correct
30 Correct 417 ms 32904 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 20488 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 4 ms 3020 KB Output is correct
6 Correct 5 ms 3000 KB Output is correct
7 Correct 5 ms 3020 KB Output is correct
8 Correct 180 ms 20488 KB Output is correct
9 Correct 189 ms 20120 KB Output is correct
10 Correct 100 ms 14216 KB Output is correct
11 Correct 342 ms 26324 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 2 ms 2636 KB Output is correct
17 Correct 8 ms 3196 KB Output is correct
18 Correct 9 ms 3404 KB Output is correct
19 Correct 189 ms 21252 KB Output is correct
20 Correct 505 ms 35496 KB Output is correct
21 Correct 344 ms 28388 KB Output is correct
22 Correct 317 ms 29468 KB Output is correct
23 Correct 575 ms 35436 KB Output is correct
24 Correct 309 ms 23400 KB Output is correct
25 Correct 304 ms 27048 KB Output is correct
26 Correct 314 ms 27028 KB Output is correct
27 Correct 2 ms 2636 KB Output is correct
28 Correct 2 ms 2636 KB Output is correct
29 Correct 2 ms 2636 KB Output is correct
30 Correct 2 ms 2636 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 4 ms 3020 KB Output is correct
33 Correct 5 ms 3148 KB Output is correct
34 Correct 11 ms 3628 KB Output is correct
35 Correct 8 ms 3532 KB Output is correct
36 Correct 186 ms 21060 KB Output is correct
37 Correct 329 ms 27732 KB Output is correct
38 Correct 489 ms 35328 KB Output is correct
39 Correct 552 ms 36956 KB Output is correct
40 Correct 419 ms 32820 KB Output is correct
41 Correct 305 ms 26888 KB Output is correct
42 Correct 307 ms 26944 KB Output is correct
43 Correct 320 ms 27900 KB Output is correct
44 Correct 2 ms 2636 KB Output is correct
45 Correct 2 ms 2636 KB Output is correct
46 Correct 2 ms 2676 KB Output is correct
47 Correct 2 ms 2636 KB Output is correct
48 Correct 2 ms 2636 KB Output is correct
49 Correct 5 ms 3148 KB Output is correct
50 Correct 6 ms 3196 KB Output is correct
51 Correct 10 ms 3660 KB Output is correct
52 Correct 9 ms 3660 KB Output is correct
53 Correct 176 ms 21160 KB Output is correct
54 Correct 495 ms 35236 KB Output is correct
55 Correct 545 ms 37084 KB Output is correct
56 Correct 417 ms 32904 KB Output is correct
57 Correct 723 ms 47112 KB Output is correct
58 Correct 187 ms 21380 KB Output is correct
59 Correct 335 ms 28412 KB Output is correct