Submission #798638

#	Time	Username	Problem	Language	Result	Execution time	Memory
798638		gg123_pe	Strange Device (APIO19_strange_device)	C++14	15 / 100	937 ms	32324 KiB

strange_device

#include <bits/stdc++.h> 
using namespace std; 

typedef long long ll; 
#define f(i,a,b) for(int i = a; i < b; i++)
const int N = 1e6 + 5; 

int n; 
ll l[N], r[N]; 
ll A, B, S; 

void subtask_1(){
    set <pair<ll,ll>> s;

    f(i,1,n+1){
        for(ll j = l[i]; j <= r[i]; j++){
            ll a, b; 
            a = (j + j/B) % A; 
            b = j % B; 
            s.insert({a, b}); 
        }
    }
    cout << s.size() << "\n"; 
}
void subtask_2(){
    ll X = A / __gcd(A, B+1);  
    ll period = X * B;  
    cout << min(r[1] - l[1] + 1, period) << "\n"; 
}
int main(){
    cin >> n >> A >> B; 

    f(i,1,n+1){
        cin >> l[i] >> r[i]; 
        S += r[i] - l[i] + 1; 
    }

    if(S <= N){
        subtask_1(); 
        return 0; 
    }
    if(n == 1){
        subtask_2(); 
        return 0; 
    }
    return 0; 
}

• Subtask 1: 10 / 10
• Subtask 2: 5 / 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