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Submission #287563

# Submission time Handle Problem Language Result Execution time Memory
287563 2020-08-31T20:07:17 Z DanerZein Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 530968 KB 
#include <bits/stdc++.h>
#include "walk.h"
#define msize 1750000
#define MAX 9223372036854775806
using namespace std;
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ii> vi;
ll dist[msize];
ll isq[msize];
vector<vi> G;
void dijktra(ll u){
  memset(isq,0,sizeof isq);
  for(int i=0;i<=msize;i++){
    dist[i]=MAX;
  }
  priority_queue<ii,vi,greater<ii> > pq;
  dist[u]=0;
  isq[u]=1;
  pq.push(ii(0,u));
  while(!pq.empty()){
    ll x=pq.top().second;
    ll di=pq.top().first;
    pq.pop();
    isq[x]=0;
    // if(di>dist[x]) continue;
    for(auto &v:G[x]){
      ll w=v.first;
      if(dist[v.second]>dist[x]+w){
	dist[v.second]=dist[x]+w;
	if(isq[v.second]==0){
	  pq.push(ii(dist[v.second],v.second));
	  isq[v.second]=1;
	}
      }
    }
  }
}
long long min_distance(std::vector<int> x, std::vector<int> h, std::vector<int> l, std::vector<int> r, std::vector<int> y, int s, int g) {
  ll no;
  no=0;
  map<ii,ll> m;
  G.resize(msize);
  vi aux;
  for(int i=0;i<y.size();i++){
    ll ant=-1,id;
    for(int j=l[i];j<=r[i];j++){
      if(h[j]>=y[i]){
	if(m[ii(x[j],y[i])]==0){
	  no++;
	  m[ii(x[j],y[i])]=no;
	}
	aux.push_back(ii(x[j],y[i]));
	if(ant==-1){
	  ant=m[ii(x[j],y[i])];
	  id=j;
	}
	else{
	  ll dis=abs(x[j]-x[id]);
	  ll u=m[ii(x[j],y[i])];
	  G[ant].push_back(ii(dis,u));
	  G[u].push_back(ii(dis,ant));
	  ant=u;
	  id=j;
      }
      }
    }
  }
  if(m[ii(x[s],0)]==0){
    no++;
    m[ii(x[s],0)]=no;
    aux.push_back(ii(x[s],0));
  }
  if(m[ii(x[g],0)]==0){
    no++;
    m[ii(x[g],0)]=no;
    aux.push_back(ii(x[g],0));                       
  }
  sort(aux.begin(),aux.end());
  for(int i=1;i<aux.size();i++){
    if(aux[i].first==aux[i-1].first){
      int u=m[ii(aux[i].first,aux[i].second)];
      int v=m[ii(aux[i-1].first,aux[i-1].second)];
      int w=abs(aux[i].second-aux[i-1].second);
      G[u].push_back(ii(w,v));
      G[v].push_back(ii(w,u));
    }
  }
  dijktra(m[ii(x[s],0)]);
   if(dist[m[ii(x[g],0)]]==MAX) dist[m[ii(x[g],0)]]=-1;
  ll res=dist[m[ii(x[g],0)]];
  return res;
}

Compilation message

walk.cpp: In function 'void dijktra(ll)':
walk.cpp:23:8: warning: unused variable 'di' [-Wunused-variable]
   23 |     ll di=pq.top().first;
      |        ^~
walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:45:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   for(int i=0;i<y.size();i++){
      |               ~^~~~~~~~~
walk.cpp:80:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |   for(int i=1;i<aux.size();i++){
      |               ~^~~~~~~~~~~
walk.cpp: In function 'void dijktra(ll)':
walk.cpp:15:12: warning: iteration 1750000 invokes undefined behavior [-Waggressive-loop-optimizations]
   15 |     dist[i]=MAX;
      |            ^
walk.cpp:14:16: note: within this loop
   14 |   for(int i=0;i<=msize;i++){
      |                ^
walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:59:24: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |    ll dis=abs(x[j]-x[id]);
      |                        ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 68856 KB Output is correct
2 Correct 43 ms 68856 KB Output is correct
3 Correct 45 ms 68848 KB Output is correct
4 Correct 44 ms 68856 KB Output is correct
5 Correct 45 ms 68984 KB Output is correct
6 Correct 44 ms 68856 KB Output is correct
7 Correct 44 ms 68856 KB Output is correct
8 Correct 44 ms 68864 KB Output is correct
9 Correct 44 ms 68856 KB Output is correct
10 Correct 44 ms 68984 KB Output is correct
11 Correct 44 ms 68864 KB Output is correct
12 Correct 43 ms 68864 KB Output is correct
13 Correct 44 ms 68856 KB Output is correct
14 Correct 44 ms 68984 KB Output is correct
15 Correct 43 ms 68856 KB Output is correct
16 Correct 44 ms 68860 KB Output is correct
17 Correct 44 ms 68984 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 68852 KB Output is correct
2 Correct 43 ms 68856 KB Output is correct
3 Correct 1568 ms 210636 KB Output is correct
4 Correct 1357 ms 207284 KB Output is correct
5 Correct 1025 ms 187744 KB Output is correct
6 Correct 1570 ms 170708 KB Output is correct
7 Correct 989 ms 187952 KB Output is correct
8 Correct 2005 ms 251584 KB Output is correct
9 Correct 1116 ms 187456 KB Output is correct
10 Correct 1914 ms 270004 KB Output is correct
11 Correct 779 ms 136404 KB Output is correct
12 Correct 433 ms 99552 KB Output is correct
13 Correct 1615 ms 241856 KB Output is correct
14 Correct 3964 ms 98796 KB Output is correct
15 Correct 2336 ms 99696 KB Output is correct
16 Correct 572 ms 102628 KB Output is correct
17 Correct 537 ms 101472 KB Output is correct
18 Execution timed out 4065 ms 52312 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 212 ms 85232 KB Output is correct
2 Runtime error 1958 ms 530968 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 212 ms 85232 KB Output is correct
2 Runtime error 1958 ms 530968 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 68856 KB Output is correct
2 Correct 43 ms 68856 KB Output is correct
3 Correct 45 ms 68848 KB Output is correct
4 Correct 44 ms 68856 KB Output is correct
5 Correct 45 ms 68984 KB Output is correct
6 Correct 44 ms 68856 KB Output is correct
7 Correct 44 ms 68856 KB Output is correct
8 Correct 44 ms 68864 KB Output is correct
9 Correct 44 ms 68856 KB Output is correct
10 Correct 44 ms 68984 KB Output is correct
11 Correct 44 ms 68864 KB Output is correct
12 Correct 43 ms 68864 KB Output is correct
13 Correct 44 ms 68856 KB Output is correct
14 Correct 44 ms 68984 KB Output is correct
15 Correct 43 ms 68856 KB Output is correct
16 Correct 44 ms 68860 KB Output is correct
17 Correct 44 ms 68984 KB Output is correct
18 Correct 43 ms 68852 KB Output is correct
19 Correct 43 ms 68856 KB Output is correct
20 Correct 1568 ms 210636 KB Output is correct
21 Correct 1357 ms 207284 KB Output is correct
22 Correct 1025 ms 187744 KB Output is correct
23 Correct 1570 ms 170708 KB Output is correct
24 Correct 989 ms 187952 KB Output is correct
25 Correct 2005 ms 251584 KB Output is correct
26 Correct 1116 ms 187456 KB Output is correct
27 Correct 1914 ms 270004 KB Output is correct
28 Correct 779 ms 136404 KB Output is correct
29 Correct 433 ms 99552 KB Output is correct
30 Correct 1615 ms 241856 KB Output is correct
31 Correct 3964 ms 98796 KB Output is correct
32 Correct 2336 ms 99696 KB Output is correct
33 Correct 572 ms 102628 KB Output is correct
34 Correct 537 ms 101472 KB Output is correct
35 Execution timed out 4065 ms 52312 KB Time limit exceeded
36 Halted 0 ms 0 KB -