Submission #289118

#	Time	Username	Problem	Language	Result	Execution time	Memory
289118		_7_7_	Toy Train (IOI17_train)	C++14	0 / 100	136 ms	1784 KiB

train

#include "train.h"
#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;
 
//#define int long long
//#pragma GCC optimize("Ofast")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
 
 
#define file(s) freopen(s".in","r",stdin); freopen(s".out","w",stdout);
#define fastio ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define all(x) x.begin(), x.end()
#define sz(s) (int)s.size()
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define s second
#define f first
 
 
 
 
typedef pair < long long, long long > pll;    
typedef pair < int, int > pii;  
typedef unsigned long long ull;         
typedef vector < pii > vpii;                                   	
typedef vector < int > vi;
typedef long double ldb;  
typedef long long ll;  
typedef double db;
 
typedef tree < int, null_type, less < int >, rb_tree_tag, tree_order_statistics_node_update > ordered_set;
 
const int inf = 1e9, maxn = 2e5 + 48, mod = 998244353, N = 5012;
const int dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1}, block = 300;
const pii base = mp(1171, 3307), Mod = mp(1e9 + 7, 1e9 + 9);
const db eps = 1e-12, pi = acos(-1);
const ll INF = 1e18;


int n, cnt[N], m, ok, a[N], r[N], v[N*5], u[N*5];
bool was[N], was1[N];
queue < int > q;
vi g[N], gr[N];



vi who_wins(vi A, vi R, vi U, vi V) {
	n = sz(A);
	m = sz(V);
	
	for (int i = 0; i < n; ++i) {
		a[i] = A[i]; 
		r[i] = R[i];
	}

	for (int i = 0; i < m; ++i) {
		v[i] = V[i];
		u[i] = U[i];
	}



	for (int i = 0; i < m; ++i) {
		g[u[i]].pb(v[i]);	      
		gr[v[i]].pb(u[i]);
	}

	bool run;
	do {
		run = 0;
		for (int i = 0; i < n; ++i) {
			was1[i] = 0;
			if (!was[i] && r[i])  {
				q.push(i);          
				was1[i] = 1;
			}

			cnt[i] = !a[i] ? sz(g[i]) : 1;
		}

		while (sz(q)) {
			int v = q.front();
			q.pop();
			for (auto to : gr[v]) {
				--cnt[to];
				if (!was[to] && !was1[to] && !cnt[to]) {
					q.push(to);
					was1[to] = 1;
				}
			}
		}

		for (int i = 0; i < n; ++i) {
			if (!was1[i] && !was[i]) {
				q.push(i);
				was[i] = 1;
			}
			cnt[i] = a[i] ? sz(g[i]) : 1;		
		}
		
		while (sz(q)) {
			run = 1;
			int v = q.front();
			q.pop();
			for (auto to : gr[v]) {
				--cnt[to];
				if (!was[to] && !cnt[to]) {
					q.push(to);
					was[to] = 1;
				}
			}
		}

		for (int i = 0; i < n; ++i)
			if (!was[i]) 
				for (int j = 0; j < sz(g[i]); ++j)
					if (was[g[i][j]]) {
						swap(g[i][j], g[i].back());
						g[i].ppb();
						--j;
					}
			
	} while (run);

	vi ans;
	for (int i = 0; i < n; ++i)
		ans.pb(was[i]);

	return ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51