Submission #850788

#	Time	Username	Problem	Language	Result	Execution time	Memory
850788		emad234	Art Collections (BOI22_art)	C++17	Compilation error	0 ms	0 KiB

art

#include <bits/stdc++.h>
#define aint(v) ((v).begin(),(v).end())
#define ll long long
#define F first
#define S second
using namespace std;
const int mod = 1e9 + 7;
const int mxN = 1e7 + 5;
int p[mxN];
struct edge{
  int cost;
  int x,y;
};
bool operator<(edge a, edge b){
  return a.cost < b.cost;
}
int find(int x){
  return (p[x] == x ? x : p[x] = find(p[x]));
}
void merge(int a,int b){
  int fa = find(a),fb = find(b);
  p[fa] = p[fb] = p[a] = p[b] = (rand() % 2 ? fa : fb);

}
int a[2030],b[2030];
edge v[mxN];
signed main()
{
  freopen("fencedin.in", "r", stdin);
  freopen("fencedin.out", "w", stdout);
  int A,B,n,m;
  cin >>A>>B>>n>>m;
  a[n + 1] = A;
  b[m + 1] = B;
  for(int i = 1;i <= n;i++) cin>>a[i];
  for(int i = 1;i <= m;i++) cin >>b[i];
  n += 2;
  m += 2;
  sort(a,a + n);
  sort(b,b + m);
  int id = 0;
  for(int i = 1;i <= 1e7;i++) p[i] = i;
  for(int i = 1;i < n;i++){
    int prev = (a[i - 1]);
    int off = i * (m - 1) - (m - 1);
    for(int j = 1;j < m;j++){
      int prevm = (b[j - 1]);
      if(j != m - 1){
        v[id] = {a[i] - prev,j + off,j + 1 + off};
        id++;
      }
      if(i != n - 1){
        v[id] = {b[j] - prevm,j + off,j + (m - 1) + off};
        id++;
      }
    }
  }
  sort(v,v + id + 1);
  ll ans = 0;
  for(int i = 0;i <= id;i++){
    auto x = v[i];
    // cout<<x.x<<' '<<x.y<<' '<<x.cost<<'\n';
    if(find(x.x) != find(x.y)){
      ans += x.cost;
      merge(x.x,x.y);
    }
  }
  cout<<ans;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:29:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |   freopen("fencedin.in", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:30:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |   freopen("fencedin.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
/usr/bin/ld: /tmp/ccmjgNwW.o: in function `main':
interface.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc33geGU.o:art.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccmjgNwW.o: in function `main':
interface.cpp:(.text.startup+0x16): undefined reference to `solve(int)'
collect2: error: ld returned 1 exit status