Submission #962025

#	Time	Username	Problem	Language	Result	Execution time	Memory
962025		Amr	Strange Device (APIO19_strange_device)	C++17	5 / 100	75 ms	21424 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
typedef unsigned long long ull;
ll lo(ll x)
{
    ll cnt = 0;
    while(x) cnt++,x/=10;
    return cnt-1;
}
ll f(ll x, ll y)
{
    ll m = (x/power(10,lo(x)))*(y/power(10,lo(y)));
    return (lo(x)+lo(y)+lo(m)>=19||(x*y)>1e18);
}
pair<ll,ll> arr[N];
void solve()
{
    ll n;
    ull a , b;
    cin >> n >> a >> b;
    ll mgcd = __gcd(a,b+1);
    a/=mgcd;
    ull cntans = 0;
    for(int i = 1; i <= n; i++)
    {
        cin >> arr[i].F >> arr[i].S;
        cntans+= arr[i].S-arr[i].F+1;
    }
    if(f(a,b))
    {
        cout << cntans << endl; return;
    }
    else cout << min(cntans,a*b) << endl;
}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
    while(TT--)
        solve();

    return 0;
}

• Subtask 1: 0 / 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