Submission #1213343

#	Time	Username	Problem	Language	Result	Execution time	Memory
1213343		LIA	Ideal city (IOI12_city)	C++17	0 / 100	9 ms	580 KiB

city

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

typedef int ll;
typedef tuple<ll, ll, ll> plll;
typedef vector<plll> vplll;
typedef pair<ll, ll> pll;
typedef vector<ll> vll;
typedef vector<pll> vpll;
typedef vector<vector<pll>> vvpll;
typedef vector<vector<ll>> vvll;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;
#define loop(i, s, e) for (ll i = (s); i < (e); ++i)
#define loopr(i, e, s) for (ll i = (e)-1; i >= (s); --i)
#define all(a) a.begin(), a.end()
const ll inf = 1e9;
ll ans = 0;
ll n;

typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> ost;

int DistanceSum(int N, int *x, int *y) {
  n = N;
  ost xi, yi;
  loopr(i, n, 0) {
    ll in = n - 1 - i;
    ll bigger = xi.size() - xi.order_of_key(x[i]);
    ll smaller = in - bigger;
    ans = (ans - bigger * x[i] + smaller * x[i]) % inf;
    bigger = yi.size() - yi.order_of_key(y[i]);
    smaller = in - bigger;
    ans = (ans - (bigger * y[i])%inf + (smaller * y[i])%inf) % inf;
    xi.insert(x[i]);
    yi.insert(y[i]);
  }

  xi.clear();
  yi.clear();
  loop(i, 0, n) {
    ll in = i;
    ll bigger = xi.size() - xi.order_of_key(x[i]);
    ll smaller = in - bigger;
    ans = (ans - bigger * x[i] + smaller * x[i]) % inf;
    bigger = yi.size() - yi.order_of_key(y[i]);
    smaller = in - bigger;
    ans = (ans - (bigger * y[i])%inf + (smaller * y[i])%inf) % inf;
    xi.insert(x[i]);
    yi.insert(y[i]);
  }

  return ans;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45