Submission #285027

#	Time	Username	Problem	Language	Result	Execution time	Memory
285027		leductoan	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	647 ms	22408 KiB

worst_reporter3

#include<bits/stdc++.h>
using namespace std;
#define task "reporter3"
#define lb lower_bound
#define ub upper_bound
#define ALL(v) (v).begin(),(v).end()
#define zs(v) ll((v).size())
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define rep(i,a,b) for(ll i=(a),_b=(b);i<=_b;++i)
#define per(i,b,a) for(ll i=(b),_a=(a);i>=_a;--i)
#define rep_(i,a,b) for(ll i=(a),_b=(b);i<_b;++i)
typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pii;
const ll d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const ll d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};
const ll mod=1000000007; /// 998244353
const ll base=311;
const ll N=5e5+5;

ll n,q,a[N];
ll b[N];

void biot()
{
    cin>>n>>q;
    for(ll i=1;i<=n;++i) cin>>a[i];
    b[0]=1;
    for(ll i=1;i<=n;++i)
    {
        b[i]=((a[i]+b[i-1]-1)/b[i-1])*b[i-1];
//        cout<<b[i]<<' ';
    }
//    cout<<endl;
    while(q--)
    {
        ll L,R,t;
        cin>>t>>L>>R;
        ll l=0, r=n;
        ll ansl=-1, ansr=-1;
        while(l<=r)
        {
            ll mid=(l+r)>>1;
            if((t/b[mid])*b[mid]-mid>=L) l=mid+1, ansl=mid;
            else r=mid-1;
        }
//        for(ll i=1;i<=n;++i) cout<<t/b[i]*b[i]-i<<' ';
//        cout<<endl;
        l=0, r=n;
        while(l<=r)
        {
            ll mid=(l+r)>>1;
            if(t/b[mid]*b[mid]-mid<=R) r=mid-1, ansr=mid;
            else l=mid+1;
        }
//        cout<<ansr<<endl;
        if(ansr==-1||ansl==-1) cout<<0<<'\n';
        else cout<<ansl-ansr+1<<'\n';
    }
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(fopen(task".inp","r"))
    {
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    biot();
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   69 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
worst_reporter3.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   70 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81