Submission #962018

#	Time	Username	Problem	Language	Result	Execution time	Memory
962018		Amr	Strange Device (APIO19_strange_device)	C++17	0 / 100	105 ms	47192 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;
}
vector<ll> v[N];
ll npr[N];
void solve()
{
    ll n , a , b; cin >> n >> a >> b;
    multiset<ll> s;
    ll aa = a;
    for(int i = 0; i < v[a].sz; i++)
    {
        ll pr = v[a][i];
        ll cnt = 0;
        while(aa%pr==0) cnt++,aa/=pr;
        for(int k = 0; k < cnt; k++)s.insert(pr);
    }
    ll bb = (b+1);
    for(int i = 0; i < v[b+1].sz; i++)
    {
        ll pr = v[b+1][i];
        ll cnt = 0;
        while(bb%pr==0) cnt++,bb/=pr;
        for(int k = 0; k < cnt; k++)
        {
            if(s.find(pr)!=s.end()) s.erase(s.find(pr)); else break;
        }
    }
    ll dis = 1;
    for(auto it = s.begin(); it !=s.end(); it++)
        dis*=*it;
    dis*=b;
    ll x , y; cin >> x >> y;

    cout << min(dis,y-x+1) << endl;

}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
    for(int i = 2; i < N; i++)
    {
        if(npr[i]==0)
        for(int j = i; j < N; j+=i)
        {
            npr[j] = 1;
            v[j].push_back(j);
        }
    }
    while(TT--)
        solve();

    return 0;
}

Compilation message (stderr)

strange_device.cpp: In function 'void solve()':
strange_device.cpp:37:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i = 0; i < v[a].sz; i++)
      |                      ^
strange_device.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i = 0; i < v[b+1].sz; i++)
      |                      ^

• 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