Submission #136661

#	Time	Username	Problem	Language	Result	Execution time	Memory
136661		KLPP	Strange Device (APIO19_strange_device)	C++14	0 / 100	5085 ms	524292 KiB

strange_device

#include<bits/stdc++.h>

using namespace std;
typedef long long int lld;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define trav(a,v) for(auto a:v)
lld GCD(lld x, lld y){
  if(y==0)return x;
  return GCD(y,x%y);
}

int main(){
  srand(time(NULL));
  lld n,A,B;
  cin>>n>>A>>B;
  /*n=1;
  A=rand()%100;
  B=rand()%100;*/
  lld l[n];
  lld r[n];
  rep(i,0,n){
    cin>>l[i]>>r[i];
    /*l[i]=rand()%200;
    r[i]=rand()%200;
    if(l[i]>r[i])swap(l[i],r[i]);*/
  }
  lld D=GCD(A,B+1);
  D=A/D;
  if(n>1){
    set<pair<lld,lld> >s;
    rep(i,0,n){
      for(lld j=l[i];j<=r[i];j++){
	s.insert(pair<lld,lld>((j+(j/B))%A,j%B));
      }
    }
    cout<<s.size()<<endl;
    return 0;
  }
  cout<<min(r[0]-l[0]+1,D*B)<<endl;
  //cout<<s.size()<<" "<<min(r[0]-l[0]+1,D*B)<<" "<<A<<" "<<B<<" "<<l[0]<<" "<<r[0]<<endl;
  //trav(a,s)cout<<a.first<<" "<<a.second<<endl;
  return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30