Submission #916933

#	Time	Username	Problem	Language	Result	Execution time	Memory
916933		alexdd	Worst Reporter 3 (JOI18_worst_reporter3)	C++17	0 / 100	2050 ms	4500 KiB

worst_reporter3

#include<bits/stdc++.h>
using namespace std;
#define int long long
int n,q;
int d[500005];
int calc_cur(int i, int ult)
{
    return -i + ((ult + i - 1)/d[i]) * d[i];
}
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>q;
    for(int i=1;i<=n;i++)
        cin>>d[i];
    int le,ri,t;
    while(q--)
    {
        cin>>t>>le>>ri;
        int cnt=0,mxm=0,ult=t;
        if(le<=t && t<=ri)
            cnt++;
        for(int i=1;i<=n;i++)
        {
            int cur;
            if(d[i]>mxm)
            {
                mxm=d[i];
                cur=calc_cur(i,ult);
            }
            else
            {
                cur=ult-1;
            }
            ult=cur;
            if(le<=cur && cur<=ri)
                cnt++;
        }
        cout<<cnt<<"\n";
    }
    return 0;
}
/**

poz(t,i) = min(((x-i) - (x-i)%d[x])) pt x<=i

-9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9
 4  2     1  3     3        *

-9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9
             5  3  2  1  3  3  *

-9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9
             7           3  2  1  3  3  *


*/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 12
• Subtask 3: 0 / 81