Submission #484386

#	Time	Username	Problem	Language	Result	Execution time	Memory
484386		Valera_Grinenko	송금 (JOI19_remittance)	C++17	0 / 100	1 ms	204 KiB

remittance

#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>
#include <set>
#include <stack>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cmath>
#include <queue>
#include <bitset>
#include <numeric>
#include <array>
#include <cstring>
#include <random>
#include <chrono>
#include <ctime>
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define make_unique(x) sort(all((x))); (x).resize(unique(all((x))) - (x).begin())
typedef long long ll;
typedef long double ld;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
// template<class T>
// using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
int main() {

  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

  int n;

  cin >> n;

  vector<pair<ll, ll> > a(n);

  for(auto& x : a) cin >> x.fi >> x.se;

  set<pair<ll, ll> > av;

  for(int i = 0; i < n; i++) av.insert(mp(a[i].fi - a[i].se, i));

  while(!av.empty()) {
    auto cx = *av.rbegin(); av.erase(cx);
    if(cx.fi < 2) continue;
    cx.fi -= 2;
    a[cx.se].fi -= 2;
    if(av.count(mp(a[(cx.se + 1) % n].fi - a[(cx.se + 1) % n].se, (cx.se + 1) % n))) {
      av.erase(mp(a[(cx.se + 1) % n].fi - a[(cx.se + 1) % n].se, (cx.se + 1) % n));
    }
    a[(cx.se + 1) % n].fi += 1;
    av.insert(mp(a[(cx.se + 1) % n].fi - a[(cx.se + 1) % n].se, (cx.se + 1) % n));
    av.insert(mp(a[cx.se].fi - a[cx.se].se, cx.se));
  }

  for(int i = 0; i < n; i++)
    if(a[i].fi != a[i].se) {
      cout << "No\n";
      return 0;
    }

  cout << "Yes\n";

  return 0;
}
/*
hmmmm
*/

Compilation message (stderr)

remittance.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45