Submission #392380

#	Time	Username	Problem	Language	Result	Execution time	Memory
392380		arwaeystoamneg	Game (IOI14_game)	C++17	0 / 100	3 ms	588 KiB

game

// EXPLOSION!
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<unordered_set>
#include<unordered_map>
#include<chrono>

using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpi;
typedef vector<pair<ll, ll>> vpll;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

#define pb push_back
#define mp make_pair
#define rsz resize
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define f first
#define s second
#define cont continue
#define endl '\n'
//#define ednl '\n'
#define test int testc;cin>>testc;while(testc--)
#define pr(a, b) trav(x,a)cerr << x << b; cerr << endl;
#define message cout << "Hello World" << endl;
const int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 }; // for every grid problem!!
const ll linf = 4000000000000000000LL;
const ll inf = 1000000007;//998244353    

void pv(vi a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vll a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vector<vi>a) {
	F0R(i, sz(a)) { cout << i << endl; pv(a[i]); cout << endl; }
}void pv(vector<vll>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); }cout << endl; }void pv(vector<string>a) { trav(x, a)cout << x << endl; cout << endl; }
void setIO(string s) {
	ios_base::sync_with_stdio(0); cin.tie(0);
	if (sz(s))
	{
		freopen((s + ".in").c_str(), "r", stdin);
		if (s != "test2")
			freopen((s + ".out").c_str(), "w", stdout);
	}
}
#ifndef arwaeystoamneg
#include "game.h";
#endif
int n;
const int MAX = 1505;
bitset<MAX>done;
int a[MAX], cur;
vi adj[MAX];
set<int>temp[MAX];
void initialize(int n_)
{
	n = n_;
	cur = n;
	F0R(i, n)temp[0].insert(i);
}
int c = 0;
int hasEdge(int x, int y)
{
	c++;
	if (done[x] && done[y])
	{
		assert(c == n * (n - 1) / 2);
		return 1;
	}
	if (done[x] || done[y])
	{
		return 1;
	}
	if (!done[x] && !done[y])
	{
		temp[a[x]].erase(x);
		temp[a[y]].erase(y);
		a[x]++;
		a[y]++;
		temp[a[x]].insert(x);
		temp[a[y]].insert(y);
		adj[x].pb(y);
		adj[y].pb(x);
	}
	if (a[x] == cur - 2)
	{
		cur--;
		done[x] = 1;
		temp[a[x]].erase(x);
		trav(t, adj[x])
		{
			if (done[t])continue;
			temp[a[t]].erase(t);
			a[t]--;
			temp[a[t]].insert(t);
		}
		while (1)
		{
			if (!sz(temp[cur - 2]))break;
			int i = *temp[cur - 2].begin();
			temp[cur - 2].erase(temp[cur - 2].begin());
			done[i] = 1;
			cur--;
			trav(t, adj[i])
			{
				if (done[t])continue;
				temp[a[t]].erase(t);
				a[t]--;
				temp[a[t]].insert(t);
			}
		}
	}
	else if (a[y] == cur - 2)
	{
		cur--;
		done[y] = 1;
		temp[a[y]].erase(y);
		trav(t, adj[y])
		{
			if (done[t])continue;
			temp[a[t]].erase(t);
			a[t]--;
			temp[a[t]].insert(t);
		}
		while (1)
		{
			if (!sz(temp[cur - 2]))break;
			int i = *temp[cur - 2].begin();
			temp[cur - 2].erase(temp[cur - 2].begin());
			done[i] = 1;
			cur--;
			trav(t, adj[i])
			{
				if (done[t])continue;
				temp[a[t]].erase(t);
				a[t]--;
				temp[a[t]].insert(t);
			}
		}
	}
	return 0;
}
#ifdef arwaeystoamneg
int main()
{
	setIO("");
	int n;
	cin >> n;
	int t = n * (n - 1) / 2;
	initialize(n);
	vpi ans;
	while (t--)
	{
		int x, y;
		cin >> x >> y;
		int t = hasEdge(x, y);
		cout << (t ? "YES" : "NO") << endl;
		if (t)ans.pb({ x,y });
	}
	trav(x, ans)cout << x.f << " " << x.s << endl;
}


#endif

Compilation message (stderr)

game.cpp:54:18: warning: extra tokens at end of #include directive
   54 | #include "game.h";
      |                  ^
game.cpp: In function 'void setIO(std::string)':
game.cpp:48:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   48 |   freopen((s + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
game.cpp:50:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   50 |    freopen((s + ".out").c_str(), "w", stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 27
• Subtask 3: 0 / 58