Submission #120565

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
120565	2019-06-25 00:52:31	nandonathaniel	Strange Device (APIO19_strange_device)	C++14	100 / 100	687 ms	68936 KiB

strange_device

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#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
const LL INF=2e18;
const LL MAXN=2e6+5;
LL kali(LL a,LL b){
  if(b==1)return a;
  LL ret=kali(a,b/2);
  ret=min(INF,2LL*ret);
  if(b&1)ret=min(INF,ret+a);
  return ret;
}
LL L[MAXN],R[MAXN];
pair<LL,LL> isi[MAXN];
int main(){
  ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
  LL n,A,B;
  cin >> n >> A >> B;
  for(LL i=1;i<=n;i++){
    cin >> L[i] >> R[i];
  }
  LL p=kali(A/__gcd(A,B+1),B);
  LL baru=n+1;
  for(LL i=1;i<=n;i++){
    if(R[i]-L[i]+1>=p){
      cout << p << endl;
      return 0;
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30