Submission #41383

#	Time	Username	Problem	Language	Result	Execution time	Memory
41383		Nurlykhan	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	2 ms	552 KiB

bridge

#include <bits/stdc++.h>

#define pii pair<int, int>
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define ll long long
#define ld long double
#define sz(v) int(v.size())
#define all(v) v.begin(), v.end()
#define vec vector<int>
#define dead not_bad
#define bad gooood

#define left not_right
#define y1 what

using namespace std;

const int N = (int) 2e5 + 10;
const int M = (int) 2e6;
const ll LINF = (ll) 2e18;
const int INF = (int) 1e9 + 7;
const int ALPHA = 26;
const int mod = INF;
const double PI = 3.14159265359;
const ld EPS = (ld) 1e-12;

const int nx[4] = {0, 0, -1, 1};
const int ny[4] = {1, -1, 0, 0};


ll solve(vec a, vec b) {
  vector<pair<int, ll> > arr[2];
  int n = sz(a);
  for (int i = 0; i < n; i++) {
    arr[0].pb(mp(min(a[i], b[i]), a[i] + b[i]));
    arr[1].pb(mp(max(a[i], b[i]), a[i] + b[i]));
  }
  for (int iter = 0; iter < 2; iter++) {
    sort(all(arr[iter]));
    for (int i = 1; i < n; i++) {
      //arr[iter][i].s += arr[iter][i - 1].s;
    }
  }
  vec x_arr;
  for (auto it : a) {
    x_arr.pb(it);
  }
  for (auto it : b) {
    x_arr.pb(it);
  }
  /*  
  for (auto it : a) {
    cout << it << ' ';
  }
  cout << endl;
  for (auto it : b) {
    cout << it << ' ';
  }
  cout << endl;
  */
  ll ans = LINF;
  for (auto x : x_arr) {
    //if (x != 4) continue;
    ll cur = 0;
    /*
    for (auto it : arr[0]) {
      if (it.f > x) {
        cur += it.s - 2 * x;
      }
    }
    //cout << cur << ' '; cur = 0;
    for (auto it : arr[1]) {
      if (it.f < x) {
        cur += 2 * x - it.s;
      }
    }
    */
    //cout << cur << ' '; cur = 0;
    for (int i = 0; i < n; i++) {
      if (a[i] <= x && x <= b[i]) {
        cur += b[i] - a[i];
      } else if (min(a[i], b[i]) > x) {
        cur += a[i] + b[i] - 2 * x;
      } else if (max(a[i], b[i]) < x) {
        cur += 2 * x - (a[i] + b[i]);
      } else {
        assert(0);
      }
    }
    ans = min(ans, cur);
    //cout << cur << endl;
  }
  return ans + n;
}


int k, n;
int a[N], b[N];


int main() {
  #define fn "teams"
  #ifdef witch
      freopen("input.txt", "r", stdin);
      freopen("output.txt", "w", stdout);
  #else
      //freopen(fn".in", "r", stdin);
      //freopen(fn".out", "w", stdout);
  #endif  
  int nn;
  ll ans = 0;
  cin >> k >> nn;
  vec A, B;
  for (int i = 1; i <= nn; i++) {
    char ta, tb;
    int x1, x2;
    cin >> ta >> x1 >> tb >> x2;
    //cout << ta << ' ' << x1 << ' ' << tb << ' ' << x2 << endl;
    if (ta == tb) {
      ans += abs(x2 - x1);
    } else {
      if (x1 > x2) 
        swap(x1, x2);
      ++n;
      a[n] = x1;
      b[n] = x2;
      A.pb(a[n]);
      B.pb(b[n]);
    }
  }
  cout << ans + solve(A, B);
  return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37