Submission #536786

#	Time	Username	Problem	Language	Result	Execution time	Memory
536786		kym	Railway Trip 2 (JOI22_ho_t4)	C++14	8 / 100	2124 ms	484440 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int ll 
#define FOR(i,s,e) for(ll i = s; i <= (ll)e; ++i)
#define DEC(i,s,e) for(ll i = s; i >= (ll)e; --i)
#define IAMSPEED ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
#define db(x) cerr << #x << "=" << x << "\n"
#define db2(x, y) cerr << #x << "=" << x << " , " << #y << "=" << y << "\n"
#define db3(a,b,c) cerr<<#a<<"="<<a<<","<<#b<<"="<<b<<","<<#c<<"="<<c<<"\n"
#define dbv(v) cerr << #v << ":"; for (auto ite : v) cerr << ite << ' '; cerr <<"\n"
#define dbvp(v) cerr << #v << ":"; for (auto ite : v) cerr << "{"  << ite.f << ',' << ite.s << "} "; cerr << "\n"
#define dba(a,ss,ee) cerr << #a << ":"; FOR(ite,ss,ee) cerr << a[ite] << ' '; cerr << "\n"
#define reach cerr << "LINE: " << __LINE__ << "\n";
#else
#define db(x)
#define db2(x,y)
#define db3(a,b,c)
#define dbv(v)
#define dbvp(v)
#define dba(a,ss,ee)
#define reach 
#endif
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define ll long long 
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define f first
#define s second
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define g3(x) get<3>(x)
typedef pair <ll, ll> pi;
typedef tuple<ll,ll,ll> ti3;
typedef tuple<ll,ll,ll,ll> ti4;
ll rand(ll a, ll b) { return a + rng() % (b-a+1); }
const int MOD = 1e9 + 7;
const int inf = (int)1e9 + 500;
const long long oo = (ll)1e18 + 500;
template <typename T> void chmax(T& a, const T b) { a=max(a,b); }
template <typename T> void chmin(T& a, const T b) { a=min(a,b); }
const int MAXN = -1;
int dist[2005][2005];
int n,k,m;
pi A[2005];
vector<int> V[2005];
map<pi,bool> conn;
int32_t main() 
{
	IAMSPEED
	cin >> n >> k >> m;
	FOR(i,1,m) {
		cin >> A[i].f >> A[i].s;
	}
	FOR(i,1,n) {
		int en=0,st=n+1;
		FOR(x,1,m) {
			if(A[x].f < A[x].s) {
				if(A[x].f <= i && A[x].f + k - 1 >= i)chmax(en,A[x].s);
			} else {
				if(A[x].f-k+1 <= i && A[x].f >= i)chmin(st,A[x].s);
			}
		}
		//we get min and max for this start point.
		FOR(j,1,n) {
			if(i==j) {
				conn[pi(i,j)] = 1;
				continue;
			}
			if(j<i) {
				if(j>=st)conn[pi(i,j)]=1;
			} else {
				if(j<=en)conn[pi(i,j)]=1;
			}
		}
	}
	for(auto i:conn) {
		db2(i.f.f,i.f.s);
		V[i.f.f].pb(i.f.s);
	}
	memset(dist,-1,sizeof dist);
	FOR(i,1,n) {
		queue<int> q;
		dist[i][i] = 0;
		for(q.push(i);q.size();q.pop()) {
			int x = q.front();
			for(auto v:V[x]){
				if(dist[i][v] == -1 || dist[i][v]  > dist[i][x] + 1) {
					dist[i][v] = dist[i][x] + 1;
					q.push(v);
				}
			}
		}
	}
	int Q; cin >> Q;
	while(Q--) {
		int a,b; cin >> a >> b;
		cout << dist[a][b] << '\n';
	}
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 8
• Subtask 3: 0 / 11
• Subtask 4: 0 / 25
• Subtask 5: 0 / 35
• Subtask 6: 0 / 13