제출 #536789

#제출 시각아이디문제언어결과실행 시간메모리
536789kymRailway Trip 2 (JOI22_ho_t4)C++14
0 / 100
2079 ms524288 KiB
#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 n,k,m; int32_t main() { IAMSPEED cin >> n >> k >> m; int dist[n+5]; vector<int> V[n+5]; pi A[n+5]; 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) { continue; } if(j<i) { if(j>=st)V[i].pb(j); } else { if(j<=en)V[i].pb(j); } } } int Q; cin >> Q; while(Q--) { int a,b; cin >> a >> b; memset(dist,-1,sizeof dist); queue<int> q; dist[a] = 0; for(q.push(a);q.size();q.pop()) { int x = q.front(); for(auto v:V[x]){ if(dist[v] == -1 || dist[v] > dist[x] + 1) { dist[v] = dist[x] + 1; q.push(v); } } } cout << dist[b] << '\n'; } }
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