Submission #999019

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
999019	2024-06-15 05:09:14	huutuan	Teleporters (IOI08_teleporters)	C++14	10 / 100	1063 ms	29504 KiB

teleporters

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#include<bits/stdc++.h>
using namespace std;
const int N=2e6+10;
int jump[N], cnt[N], nxt[N], add[N];
int n, m;
int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   memset(jump, -1, sizeof jump);
   cin >> n >> m;
   for (int i=1; i<=n; ++i){
      int u, v; cin >> u >> v;
      jump[u]=v; jump[v]=u;
   }
   nxt[N-1]=N;
   for (int i=N-2; i>=0; --i){
      if (jump[i]!=-1) nxt[i]=i;
      else nxt[i]=nxt[i+1];
   }
   int ans=0, pos=0;
   while (1){
      if (pos==N) break;
      pos=nxt[pos];
      if (pos==N) break;
      ++cnt[min(pos, jump[pos])];
      pos=jump[pos]+1;
      ++ans;
 
 
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