Submission #846463

#	Time	Username	Problem	Language	Result	Execution time	Memory
846463		vjudge1	ČVENK (COI15_cvenk)	C++17	17 / 100	77 ms	2648 KiB

cvenk

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
const int N = 1e6+100, M = 1e5+10, K = 18;
const ll INF = (1ll<<60)-1;

struct Line{
  ll x, y;
  void re(){
    cin >> x >> y;
  }
  bool operator<(const Line &other) const{
    return x < other.x;
  }
};

ll r(ll n){
  if(n==0) return 1e18;
  return n & -n;
}

ll f(ll x, ll y, ll cost, vector<array<ll, 3>> &g){
  if(x==y){
    g.pb({0, 0, cost});
    return cost;
  }
  g.pb({x, y, cost});
  if(r(x) < r(y)){
    ll c;
    if(y == 0)
      c = x;
    else
      c = x - (x & (INF^(r(y)-1)));
    return cost + f(x - c, y, c, g);
  }
  ll c;
  if(x == 0)
    c = y;
  else
    c = y - (y & (INF^(r(x)-1)));
  return cost + f(x, y - c, c, g); 
}
int n;
Line a[N];
void solve(){
  cin >> n;
  for(int i = 0; i < n; ++i){
    a[i].re();
  }
  sort(a, a+n);
  ll ANS = 1e18;
  for(int rep = 0; rep < 2; ++rep){
    Line centro;
    centro.x = a[0].x;
    centro.y = a[0].y;

    for(int i = 1; i < (n+1)/2; ++i){
      vector<array<ll, 3>> X;
      f(centro.x, centro.y, 0, X);
      reverse(all(X));
      X.pb(X.back());

      vector<array<ll, 3>> Y;
      f(a[i].x, a[i].y, 0, Y);
      reverse(all(Y));
      Y.pb(Y.back());

      for(int i = 0; i < min(Y.size(), X.size()); ++i){
        if(Y[i][0] == X[i][0] && Y[i][1] == X[i][1]){
          continue;
        }else{
          if(X[i][0] == Y[i][0]){
            centro.x = X[i][0];
            centro.y = min(X[i][1], Y[i][1]);
          }else{
            centro.x = min(X[i][0], Y[i][0]);
            centro.y = Y[i][1];
          }
          break;
        }
      }
      // cout << centro.x << ' ' << centro.y << '\n';
    }
    ll ans = 0;
    vector<array<ll, 3>> Y;
    f(centro.x, centro.y, 0, Y);
    reverse(all(Y));
    Y.pb(Y.back());

    for(int i = 0; i < n; ++i){
      vector<array<ll, 3>> X;
      f(a[i].x, a[i].y, 0, X);
      ll s = centro.x + centro.y + a[i].x + a[i].y;
      reverse(all(X));
      X.pb(X.back());
      for(int i = 0; i < min(Y.size(), X.size()); ++i){
        if(Y[i][0] == X[i][0] && Y[i][1] == X[i][1]){
          s -= X[i][2] + Y[i][2];
        }else{
          s += abs(X[i][0] - Y[i][0]) + abs(Y[i][1] - X[i][1]);
          break;
        }
      }
      ans += s;
    }
    reverse(a, a+n);
    ANS = min(ans, ANS);
  }
  cout << ANS;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  // cin >> tt;
  while(tt--){
    solve();
    // en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
}

Compilation message (stderr)

cvenk.cpp: In function 'void solve()':
cvenk.cpp:74:24: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
   74 |       for(int i = 0; i < min(Y.size(), X.size()); ++i){
      |                      ~~^~~~~~~~~~~~~~~~~~~~~~~~~
cvenk.cpp:102:24: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
  102 |       for(int i = 0; i < min(Y.size(), X.size()); ++i){
      |                      ~~^~~~~~~~~~~~~~~~~~~~~~~~~
cvenk.cpp: In function 'int main()':
cvenk.cpp:121:15: warning: unused variable 'aa' [-Wunused-variable]
  121 |   int tt = 1, aa;
      |               ^~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 21
• Subtask 3: 0 / 22
• Subtask 4: 0 / 40