Submission #1122629

#	Time	Username	Problem	Language	Result	Execution time	Memory
1122629		ntdaccode	Reconstruction Project (JOI22_reconstruction)	C++17	0 / 100	1 ms	324 KiB

reconstruction

#include<bits/stdc++.h>
#define fori(i,a,b) for(int i=a;i<=b;i++)
#define int long long
#define pb push_back

using namespace std;

typedef pair<int,int> ii;
typedef tuple<int,int,int> tp;

const int M = 1e6 + 10;
const int N = 1e3 + 10;
const int mod = 1e9 + 7;

int n, m, q, uu[M], vv[M], ww[M];

int id[M];
int finded(int u)
{
  return id[u] < 0 ? u : id[u] = finded(id[u]);
}

bool unioned(int u,int v)
{
  u = finded(u);
  v = finded(v);
  if(v == u) return false;
  if(id[u] > id[v]) swap(u,v);
  id[u] += id[v];
  id[v] = u;
  return true;
}

int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  if(fopen("1.inp","r")) {
    freopen("1.inp","r",stdin);
    freopen("1.out","w",stdout);
  }

  #define task ""
  if(fopen(task".inp","r")) {
    freopen(task".inp","r",stdin);
    freopen(task".out","w",stdout);
  }


  cin >> n >> m ;
  for(int i = 1;i <= m; i++) {
    cin >> uu[i] >> vv[i] >> ww[i];
  }

  cin >> q;
  while(q--) {
    int x;
    cin >> x;
    vector<tp> edge;
    int kq = 0;
    for(int i = 1;i <= m; i++) edge.pb({abs(ww[i] - x),uu[i],vv[i]});
    sort(edge.begin(),edge.end());
    for(int i = 1;i <= n; i++) id[i] =  -1;
    int v,u,w;
    for(int i = 0;i < edge.size() - 1; i++) {
        tie(w,u,v)  = edge[i];
      if(unioned(u,v)) kq += w;
    }
    cout << kq << "\n";
  }

}

Compilation message (stderr)

reconstruction.cpp: In function 'int32_t main()':
reconstruction.cpp:41:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     freopen("1.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
reconstruction.cpp:42:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     freopen("1.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
reconstruction.cpp:47:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
reconstruction.cpp:48:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 3
• Subtask 2: 0 / 4
• Subtask 3: 0 / 7
• Subtask 4: 0 / 28
• Subtask 5: 0 / 35
• Subtask 6: 0 / 23