Submission #312508

#	Time	Username	Problem	Language	Result	Execution time	Memory
312508		monus1042	Cipele (COCI18_cipele)	C++17	63 / 90	233 ms	200884 KiB

cipele

// NK
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<ll> vll;
#define eb emplace_back
#define pb push_back
#define pob pop_back
#define psf push_front
#define pof pop_front
#define mkp make_pair
#define all(x) x.begin(), x.end()
#define Bolivia_is_nice ios::sync_with_stdio(false), cin.tie(nullptr)

/*
  3 5 5 5 7 8 8 9
  3 5 5   7 8

  brute force?
  dp?
  it is ok that it is sorted, so only matches are important
  
  f(int pos, int pos2){

  make it match -> ans1 = max( abs(pos - pos2), then f(pos-1, pos2-1) )
  don't match -> ans2 = f(pos-1, pos2)

  return min(ans1, ans2)
  }
*/

vi a,b;
const int MAXS = 5005;
int dp[MAXS][MAXS];

int f(int posa, int posb){
  if (posa == -1) return 0;
  if (dp[posa][posb] != -1) return dp[posa][posb];
  int ans1, ans2;
  ans1 = ans2 = 2e9;
  if (posa < posb){
    ans1 = max( abs(a[posa] - b[posb]), f(posa-1, posb-1) );
    ans2 = f(posa, posb-1);
  }else{
    ans1 = max( abs(a[posa] - b[posb]), f(posa-1, posb-1) );
  }
  return dp[posa][posb] = min(ans1, ans2);
}

void solve(){
  int n,m; cin>>n>>m;
  for (int i=0; i<n; ++i){
    int x; cin>>x;
    a.pb(x);
  }
  for (int i=0; i<m; ++i){
    int x; cin>>x;
    b.pb(x);
  }

  sort(all(a)), sort(all(b));
  if (a.size() > b.size()) swap(a,b);
  if (a.size() == b.size()){
    int curr = 0;
    for (int j=0; j<a.size(); ++j) curr = max(curr, abs(a[j] - b[j]));
    cout<<curr<<'\n';
    return;
  }
  memset(dp, -1, sizeof dp);
  cout<<f(a.size()-1, b.size()-1)<<'\n';
}

int main(){
  Bolivia_is_nice;
  int t = 1; //cin>>t;
  while(t--)
    solve();
	
  return 0;
}
/*
  ~/.emacs
*/

Compilation message (stderr)

cipele.cpp: In function 'void solve()':
cipele.cpp:68:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for (int j=0; j<a.size(); ++j) curr = max(curr, abs(a[j] - b[j]));
      |                   ~^~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9