oj.uz

Submission #1059438

# Submission time Handle Problem Language Result Execution time Memory
1059438 2024-08-15T00:45:32 Z vjudge1 Cities (BOI16_cities) C++17
74 / 100
 6000 ms 196952 KB 
#include<bits/stdc++.h>
#define fori(i,a,b) for(int i=a;i<=b;i++)
#define ii pair<int,long long >
#define fi first
#define se second
#define pb push_back
using namespace std;
const int M=1e5+10;
int n,m,k;
long long  f[M][1<<6];
vector<ii> ke[M];
struct node
{
  int  u,mask;
  long long val;
};
struct cmp
{
  bool operator() (node a,node b) {
    return a.val>b.val;
  }
};
priority_queue<node,vector<node> ,cmp> h;
long long  tmp[1<<6];
void dij()
{
  while(!h.empty())
  {
    node u=h.top();h.pop();
    if(f[u.u][u.mask]<u.val) continue;
    for(ii v:ke[u.u])
    {
      fori(i,0,(1<<k)-1) tmp[i|u.mask]=min(tmp[i|u.mask],u.val+f[v.fi][i]+v.se);
      fori(i,0,(1<<k)-1)
      {
        if(tmp[i]<f[v.fi][i])
        {
          f[v.fi][i]=tmp[i];
          h.push({v.fi,i,f[v.fi][i]});
        }
        tmp[i]=1e18;
      }
    }
  }
}
int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  #define task "1"
  if(fopen(task".inp","r"))
  {
    freopen(task".inp","r",stdin);
    freopen(task".out","w",stdout);
  }
  cin >> n >> k >> m;
  fori(i,1,n)
  {
    fori(j,1,(1<<k)-1) f[i][j]=1e18;
  }
  fori(i,1,(1<<k)-1) tmp[i]=1e18;
  fori(i,0,k-1)
  {
    int x;
    cin >> x;
    h.push({x,1<<i,0});
    f[x][1<<i]=0;
  }
  fori(i,1,m)
  {
    long long  u,v,w;
    cin >> u >> v >> w;
    ke[u].pb({v,w});
    ke[v].pb({u,w});
  }
  dij();
  long long  kq=1e18;
  fori(i,1,n) kq=min(kq,f[i][(1<<k)-1]);
  cout << kq;
}

Compilation message

cities.cpp: In function 'int32_t main()':
cities.cpp:54:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
cities.cpp:55:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4696 KB Output is correct
3 Correct 1 ms 4708 KB Output is correct
4 Correct 1 ms 4712 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 699 ms 79788 KB Output is correct
2 Correct 552 ms 78800 KB Output is correct
3 Correct 227 ms 62360 KB Output is correct
4 Correct 73 ms 14548 KB Output is correct
5 Correct 200 ms 67284 KB Output is correct
6 Correct 45 ms 14056 KB Output is correct
7 Correct 3 ms 4968 KB Output is correct
8 Correct 1 ms 4968 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5352 KB Output is correct
2 Correct 6 ms 5352 KB Output is correct
3 Correct 3 ms 4968 KB Output is correct
4 Correct 5 ms 5356 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2722 ms 128928 KB Output is correct
2 Correct 2448 ms 128076 KB Output is correct
3 Correct 943 ms 74668 KB Output is correct
4 Correct 1631 ms 71316 KB Output is correct
5 Correct 369 ms 34176 KB Output is correct
6 Correct 204 ms 18124 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 6033 ms 196952 KB Time limit exceeded
2 Halted 0 ms 0 KB -