Submission #781740

#	Time	Username	Problem	Language	Result	Execution time	Memory
781740		devariaota	Strange Device (APIO19_strange_device)	C++17	0 / 100	5084 ms	405456 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n,a,b;
ll l[1000005],r[1000005];
set<pair<ll,ll>> st;
map<pair<ll,ll>,ll> vis;
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.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;
    }
    ll ans=0;
    if (s<1000005){
        for (int i=1;i<=n;i++){
            for (int j=l[i];j<=r[i];j++){
                if (vis[{(j+j/b)%a,j%b}]!=1){
                    vis[{(j+j/b)%a,j%b}]=1;
                    ans++;
                }
            }
        }
        cout<<ans;
    }
    // else if ()
}

• 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