oj.uz

Submission #287566

# Submission time Handle Problem Language Result Execution time Memory
287566 2020-08-31T20:10:11 Z DanerZein Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 361816 KB 
#include <bits/stdc++.h>
#include "walk.h"
#define msize 1187500
#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 1187500 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 30 ms 46848 KB Output is correct
2 Correct 30 ms 46848 KB Output is correct
3 Correct 30 ms 46848 KB Output is correct
4 Correct 30 ms 46840 KB Output is correct
5 Correct 30 ms 46976 KB Output is correct
6 Correct 30 ms 46848 KB Output is correct
7 Correct 30 ms 46848 KB Output is correct
8 Correct 30 ms 46896 KB Output is correct
9 Correct 30 ms 46840 KB Output is correct
10 Correct 30 ms 46968 KB Output is correct
11 Correct 30 ms 46848 KB Output is correct
12 Correct 30 ms 46844 KB Output is correct
13 Correct 30 ms 46840 KB Output is correct
14 Correct 31 ms 46848 KB Output is correct
15 Correct 30 ms 46848 KB Output is correct
16 Correct 30 ms 46840 KB Output is correct
17 Correct 31 ms 46976 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 46848 KB Output is correct
2 Correct 29 ms 46848 KB Output is correct
3 Correct 1553 ms 188284 KB Output is correct
4 Correct 1340 ms 185108 KB Output is correct
5 Correct 998 ms 165536 KB Output is correct
6 Correct 1563 ms 148428 KB Output is correct
7 Correct 972 ms 165572 KB Output is correct
8 Correct 2023 ms 229368 KB Output is correct
9 Correct 1108 ms 164872 KB Output is correct
10 Correct 1907 ms 247812 KB Output is correct
11 Correct 771 ms 114136 KB Output is correct
12 Correct 431 ms 77316 KB Output is correct
13 Correct 1616 ms 219664 KB Output is correct
14 Correct 3792 ms 76600 KB Output is correct
15 Correct 2166 ms 77292 KB Output is correct
16 Correct 567 ms 80488 KB Output is correct
17 Correct 530 ms 79456 KB Output is correct
18 Execution timed out 4077 ms 38608 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 209 ms 62824 KB Output is correct
2 Runtime error 1328 ms 361816 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 209 ms 62824 KB Output is correct
2 Runtime error 1328 ms 361816 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 30 ms 46848 KB Output is correct
2 Correct 30 ms 46848 KB Output is correct
3 Correct 30 ms 46848 KB Output is correct
4 Correct 30 ms 46840 KB Output is correct
5 Correct 30 ms 46976 KB Output is correct
6 Correct 30 ms 46848 KB Output is correct
7 Correct 30 ms 46848 KB Output is correct
8 Correct 30 ms 46896 KB Output is correct
9 Correct 30 ms 46840 KB Output is correct
10 Correct 30 ms 46968 KB Output is correct
11 Correct 30 ms 46848 KB Output is correct
12 Correct 30 ms 46844 KB Output is correct
13 Correct 30 ms 46840 KB Output is correct
14 Correct 31 ms 46848 KB Output is correct
15 Correct 30 ms 46848 KB Output is correct
16 Correct 30 ms 46840 KB Output is correct
17 Correct 31 ms 46976 KB Output is correct
18 Correct 30 ms 46848 KB Output is correct
19 Correct 29 ms 46848 KB Output is correct
20 Correct 1553 ms 188284 KB Output is correct
21 Correct 1340 ms 185108 KB Output is correct
22 Correct 998 ms 165536 KB Output is correct
23 Correct 1563 ms 148428 KB Output is correct
24 Correct 972 ms 165572 KB Output is correct
25 Correct 2023 ms 229368 KB Output is correct
26 Correct 1108 ms 164872 KB Output is correct
27 Correct 1907 ms 247812 KB Output is correct
28 Correct 771 ms 114136 KB Output is correct
29 Correct 431 ms 77316 KB Output is correct
30 Correct 1616 ms 219664 KB Output is correct
31 Correct 3792 ms 76600 KB Output is correct
32 Correct 2166 ms 77292 KB Output is correct
33 Correct 567 ms 80488 KB Output is correct
34 Correct 530 ms 79456 KB Output is correct
35 Execution timed out 4077 ms 38608 KB Time limit exceeded
36 Halted 0 ms 0 KB -