Submission #171489

#	Time	Username	Problem	Language	Result	Execution time	Memory
171489		losmi247	Strange Device (APIO19_strange_device)	C++14	0 / 100	5103 ms	405904 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <ll,ll> p;
const int N = 1e6+56;
const ll inf = 4e18;

ll n,a,b,l[N],r[N];

void prvi(){
    map <p,bool> mapa;
    for(int i = 1; i <= n; i++){
        for(int t = l[i]; t <= r[i]; t++){
            ll x = (t+t/b)%a,y = t%b;
            mapa[p(x,y)] = 1;
        }
    }
    cout << mapa.size() << endl;
}

void drugi(){
    ll period = a*b;
    ll x = l[1],y = r[1];
    if(x-y+1 >= period){
        cout << period << endl;
    }
    else{
        cout << (x-y+1)%period << endl;
    }
}

void treci(){
    
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> a >> b;
    ll s = 0;
    for(int i = 1; i <= n; i++){
        cin >> l[i] >> r[i];
        s += r[i]-l[i]+1;
    }
    /*for(int t = 0; t <= 300; t++){
        ll x = (t+t/b)%a,y = t%b;
        cout << "za t = " << t << " " << x << " " << y << endl;
    }*/
    if(s <= 1000000){
        prvi();
        return 0;
    }
    if(n == 1){
        drugi();
        return 0;
    }
    if(a <= b/inf && a*b <= 1000000){
        treci();
        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