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Submission #288692

# Submission time Handle Problem Language Result Execution time Memory
288692 2020-09-01T19:02:31 Z NaimSS Toll (BOI17_toll) C++14
100 / 100
 540 ms 57464 KB 
#include <bits/stdc++.h>
#define ld long double
#define endl "\n"
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb(x) push_back(x)
#define mp(a,b) make_pair(a,b)
#define ms(v,x) memset(v,x,sizeof(v))
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define per(i, a, b) for(int i = b-1; i>=a ; i--)
#define trav(a, x) for(auto& a : x)
#define allin(a , x) for(auto a : x)
#define Unique(v) sort(all(v));v.erase(unique(all(v)),v.end());
#define sz(v) (int)v.size()
//#define int long long
using namespace std;
typedef vector<int> vi;
#define y1 abacaba
#define left sefude
#define db(x) cerr << #x <<" == "<<x << endl;
#define db2(x,y) cerr<<#x <<" == "<<x<<", "<<#y<<" == "<<y<<endl;
#define db3(x,y,z) cerr << #x<<" == "<<x<<", "<<#y<<" == "<<y<<", "<<#z<<" == "<<z<<endl; 
typedef long long ll;
typedef pair<int,int> pii;
inline ll mod(ll n, ll m ){ ll ret = n%m; if(ret < 0) ret += m; return ret; }
ll gcd(ll a, ll b){return (b == 0LL ? a : gcd(b, a%b));}
ll exp(ll a,ll b,ll m){
    if(b==0LL) return 1LL;
    if(b==1LL) return mod(a,m);
    ll k = mod(exp(a,b/2,m),m);
    if(b&1LL){
        return mod(a*mod(k*k,m),m);
    }
    else return mod(k*k,m);
}

const int N = 50100;
const int L = 17;
vector<pii> vai[N][L];

vector<pii> g[N];

int k,n,m,q;

void preprocess(){
  for(int i=0;i<n;i++){
    for(auto it : g[i]){
      vai[i][0].pb(it);
    }
  }
  for(int j=1;j<L;j++){
    for(int i=0;i<n;i++){
      map<int,int> dist;
      for(auto it : vai[i][j-1]){

        for(auto ind : vai[it.ff][j-1]){
          if(dist.count(ind.ff)){
            dist[ind.ff] = min(dist[ind.ff],ind.ss + it.ss);
          }else{
            dist[ind.ff] = ind.ss + it.ss;
          }
        }

      }
      for(auto it : dist){
        vai[i][j].pb(it);

      }
    }
  }
}

const int inf = 1e9;

int32_t main(){
  fastio;
  cin >> k >> n >> m >> q;

  for(int i=0;i<m;i++){
    int a,b,t;
    cin>>a>>b>>t;
    g[a].pb(pii(b,t));
  }

  preprocess();
  while(q--){
    int a,b;
    cin>>a>>b;
    vector<pii> act;
    act.pb(pii(a,0));
    int l = a/k;
    int need = b/k;
    int dif = need - l;
    for(int j=L-1;j>=0;j--){
      if(dif&(1<<j)){
        map<int,int>dist;
        
        for(auto it : act){

          for(auto go : vai[it.ff][j]){
            if(dist.count(go.ff)){
              dist[go.ff] = min(dist[go.ff],it.ss + go.ss);
            }else dist[go.ff] = go.ss + it.ss;

          }
        }

        act.clear();
        for(auto it : dist){
          act.pb(it);
        }

      }
    }
    int mn = inf;
    for(auto it : act){
      if(it.ff == b)mn = min(mn,it.ss);
    }
    if(mn != inf)cout << mn << endl;
    else cout << -1 << endl;
  }

  // math -> gcd it all
  // Did u check N=1? Did you switch N,M?
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 162 ms 46156 KB Output is correct
2 Correct 15 ms 21504 KB Output is correct
3 Correct 14 ms 21504 KB Output is correct
4 Correct 14 ms 21504 KB Output is correct
5 Correct 15 ms 21632 KB Output is correct
6 Correct 15 ms 21632 KB Output is correct
7 Correct 15 ms 21760 KB Output is correct
8 Correct 106 ms 38920 KB Output is correct
9 Correct 72 ms 30200 KB Output is correct
10 Correct 29 ms 21760 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 235 ms 43000 KB Output is correct
2 Correct 14 ms 21504 KB Output is correct
3 Correct 14 ms 21536 KB Output is correct
4 Correct 15 ms 21632 KB Output is correct
5 Correct 14 ms 21504 KB Output is correct
6 Correct 13 ms 21504 KB Output is correct
7 Correct 19 ms 21888 KB Output is correct
8 Correct 28 ms 22008 KB Output is correct
9 Correct 105 ms 38904 KB Output is correct
10 Correct 388 ms 56568 KB Output is correct
11 Correct 265 ms 46328 KB Output is correct
12 Correct 123 ms 32760 KB Output is correct
13 Correct 397 ms 54136 KB Output is correct
14 Correct 224 ms 41976 KB Output is correct
15 Correct 319 ms 46968 KB Output is correct
16 Correct 318 ms 46968 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 21504 KB Output is correct
2 Correct 13 ms 21504 KB Output is correct
3 Correct 14 ms 21504 KB Output is correct
4 Correct 14 ms 21504 KB Output is correct
5 Correct 14 ms 21504 KB Output is correct
6 Correct 15 ms 21760 KB Output is correct
7 Correct 17 ms 21760 KB Output is correct
8 Correct 21 ms 22144 KB Output is correct
9 Correct 20 ms 21888 KB Output is correct
10 Correct 102 ms 39032 KB Output is correct
11 Correct 232 ms 45952 KB Output is correct
12 Correct 357 ms 56312 KB Output is correct
13 Correct 365 ms 57208 KB Output is correct
14 Correct 332 ms 54264 KB Output is correct
15 Correct 300 ms 46968 KB Output is correct
16 Correct 301 ms 46968 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 21504 KB Output is correct
2 Correct 13 ms 21504 KB Output is correct
3 Correct 14 ms 21504 KB Output is correct
4 Correct 14 ms 21504 KB Output is correct
5 Correct 14 ms 21504 KB Output is correct
6 Correct 15 ms 21760 KB Output is correct
7 Correct 17 ms 21760 KB Output is correct
8 Correct 21 ms 22144 KB Output is correct
9 Correct 20 ms 21888 KB Output is correct
10 Correct 102 ms 39032 KB Output is correct
11 Correct 232 ms 45952 KB Output is correct
12 Correct 357 ms 56312 KB Output is correct
13 Correct 365 ms 57208 KB Output is correct
14 Correct 332 ms 54264 KB Output is correct
15 Correct 300 ms 46968 KB Output is correct
16 Correct 301 ms 46968 KB Output is correct
17 Correct 247 ms 46136 KB Output is correct
18 Correct 15 ms 21504 KB Output is correct
19 Correct 13 ms 21504 KB Output is correct
20 Correct 14 ms 21504 KB Output is correct
21 Correct 13 ms 21504 KB Output is correct
22 Correct 14 ms 21504 KB Output is correct
23 Correct 16 ms 21760 KB Output is correct
24 Correct 20 ms 21888 KB Output is correct
25 Correct 29 ms 22144 KB Output is correct
26 Correct 25 ms 22016 KB Output is correct
27 Correct 100 ms 38776 KB Output is correct
28 Correct 370 ms 56432 KB Output is correct
29 Correct 378 ms 57464 KB Output is correct
30 Correct 324 ms 52088 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 162 ms 46156 KB Output is correct
2 Correct 15 ms 21504 KB Output is correct
3 Correct 14 ms 21504 KB Output is correct
4 Correct 14 ms 21504 KB Output is correct
5 Correct 15 ms 21632 KB Output is correct
6 Correct 15 ms 21632 KB Output is correct
7 Correct 15 ms 21760 KB Output is correct
8 Correct 106 ms 38920 KB Output is correct
9 Correct 72 ms 30200 KB Output is correct
10 Correct 29 ms 21760 KB Output is correct
11 Correct 235 ms 43000 KB Output is correct
12 Correct 14 ms 21504 KB Output is correct
13 Correct 14 ms 21536 KB Output is correct
14 Correct 15 ms 21632 KB Output is correct
15 Correct 14 ms 21504 KB Output is correct
16 Correct 13 ms 21504 KB Output is correct
17 Correct 19 ms 21888 KB Output is correct
18 Correct 28 ms 22008 KB Output is correct
19 Correct 105 ms 38904 KB Output is correct
20 Correct 388 ms 56568 KB Output is correct
21 Correct 265 ms 46328 KB Output is correct
22 Correct 123 ms 32760 KB Output is correct
23 Correct 397 ms 54136 KB Output is correct
24 Correct 224 ms 41976 KB Output is correct
25 Correct 319 ms 46968 KB Output is correct
26 Correct 318 ms 46968 KB Output is correct
27 Correct 13 ms 21504 KB Output is correct
28 Correct 13 ms 21504 KB Output is correct
29 Correct 14 ms 21504 KB Output is correct
30 Correct 14 ms 21504 KB Output is correct
31 Correct 14 ms 21504 KB Output is correct
32 Correct 15 ms 21760 KB Output is correct
33 Correct 17 ms 21760 KB Output is correct
34 Correct 21 ms 22144 KB Output is correct
35 Correct 20 ms 21888 KB Output is correct
36 Correct 102 ms 39032 KB Output is correct
37 Correct 232 ms 45952 KB Output is correct
38 Correct 357 ms 56312 KB Output is correct
39 Correct 365 ms 57208 KB Output is correct
40 Correct 332 ms 54264 KB Output is correct
41 Correct 300 ms 46968 KB Output is correct
42 Correct 301 ms 46968 KB Output is correct
43 Correct 247 ms 46136 KB Output is correct
44 Correct 15 ms 21504 KB Output is correct
45 Correct 13 ms 21504 KB Output is correct
46 Correct 14 ms 21504 KB Output is correct
47 Correct 13 ms 21504 KB Output is correct
48 Correct 14 ms 21504 KB Output is correct
49 Correct 16 ms 21760 KB Output is correct
50 Correct 20 ms 21888 KB Output is correct
51 Correct 29 ms 22144 KB Output is correct
52 Correct 25 ms 22016 KB Output is correct
53 Correct 100 ms 38776 KB Output is correct
54 Correct 370 ms 56432 KB Output is correct
55 Correct 378 ms 57464 KB Output is correct
56 Correct 324 ms 52088 KB Output is correct
57 Correct 540 ms 57464 KB Output is correct
58 Correct 104 ms 38904 KB Output is correct
59 Correct 268 ms 46328 KB Output is correct