Submission #781732

#	Time	Username	Problem	Language	Result	Execution time	Memory
781732		makanhulia	Strange Device (APIO19_strange_device)	C++17	0 / 100	13 ms	596 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define fi first
#define se second
#define pb push_back
#define TC int t; cin>>t; while(t--)
#define all(x) (x).begin(),(x).end()
//*AC BERSAMA ALLAH  FORTIS FORTUNA ADIUVAT
//# nyampah

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    ll n,a,b; 
    cin>>n>>a>>b;

    vector<bool> freq(1000005);
    for(int i=1;i<=n;i++){
        int l,r; cin>>l>>r;
        for(int j=l;j<=r;j++){
            int k=j%(a*b);
            if(k==0) k=a*b;
            freq[k]=1;
        }
    }

    set<pair<ll,ll> > sp;
    int cnt=0;
    for(int i=0;i<1000005;i++){
        int j=i;
        if(i==0) j=a*b;
        if(freq[j]) {
            if(sp.count(make_pair((j+j/b)%a,j%b))) continue;
            sp.insert(make_pair((j+j/b)%a,j%b));
            cnt++;
        }
    }
    cout<<cnt<<'\n';


    return 0;
}

// ll gcd(ll a, ll b){
//     if(b==0) return a;
//     return gcd(b,a%b);
// }

• 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