oj.uz

Submission #1059440

# Submission time Handle Problem Language Result Execution time Memory
1059440 2024-08-15T00:51:00 Z vjudge1 Cities (BOI16_cities) C++17
74 / 100
 6000 ms 194704 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];
#define node tuple<long long ,int ,int >
priority_queue<node,vector<node> ,greater<node> > h;
long long  tmp[1<<6];
void dij()
{
  while(!h.empty())
  {
    auto [val,mask,u]=h.top();h.pop();
    if(f[u][mask]<val) continue;
    for(ii v:ke[u])
    {
      fori(i,0,(1<<k)-1) tmp[i|mask]=min(tmp[i|mask],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({f[v.fi][i],i,v.fi});
        }
        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({0,1<<i,x});
    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:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
cities.cpp:45:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4856 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 653 ms 79564 KB Output is correct
2 Correct 581 ms 78856 KB Output is correct
3 Correct 242 ms 62404 KB Output is correct
4 Correct 74 ms 14552 KB Output is correct
5 Correct 223 ms 67272 KB Output is correct
6 Correct 41 ms 14020 KB Output is correct
7 Correct 3 ms 4956 KB Output is correct
8 Correct 2 ms 4952 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5340 KB Output is correct
2 Correct 7 ms 5340 KB Output is correct
3 Correct 4 ms 5080 KB Output is correct
4 Correct 6 ms 5344 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2209 ms 128884 KB Output is correct
2 Correct 1908 ms 127976 KB Output is correct
3 Correct 943 ms 74668 KB Output is correct
4 Correct 1268 ms 71228 KB Output is correct
5 Correct 343 ms 36152 KB Output is correct
6 Correct 198 ms 18128 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 6065 ms 194704 KB Time limit exceeded
2 Halted 0 ms 0 KB -