oj.uz

Submission #281733

# Submission time Handle Problem Language Result Execution time Memory
281733 2020-08-23T11:50:09 Z MKopchev Worst Reporter 3 (JOI18_worst_reporter3) C++14
100 / 100
 953 ms 27408 KB 
#include<bits/stdc++.h>
using namespace std;

const int nmax=5e5+42,inf=1e9+42;

int n,q;

int inp[nmax];

long long help[nmax];

int score(int i,int t)
{
    return (t/help[i])*help[i]-i;
}
int last_valid(int pos,int t)
{
    int ok=n+1,not_ok=-1;

    while(ok-not_ok>1)
    {
        int av=(ok+not_ok)/2;

        if(score(av,t)<=pos)ok=av;
        else not_ok=av;
    }

    //cout<<"last "<<ok<<endl;

    return ok;
}

int first_valid(int pos,int t)
{
    int ok=-1,not_ok=n+1;

    while(not_ok-ok>1)
    {
        int av=(ok+not_ok)/2;

        if(score(av,t)>=pos)ok=av;
        else not_ok=av;
    }

    //cout<<"first "<<ok<<endl;

    return ok;
}
int main()
{
    scanf("%i%i",&n,&q);
    for(int i=1;i<=n;i++)
    {
        scanf("%i",&inp[i]);
    }
    inp[0]=1;
    help[0]=1;

    for(int i=1;i<=n;i++)
    {
        help[i]=help[i-1]*((inp[i]+help[i-1]-1)/help[i-1]);

        if(help[i]>inf)help[i]=inf;

        //cout<<i<<" -> "<<help[i]<<endl;
    }

    for(int i=1;i<=q;i++)
    {
        int l,r,t;

        scanf("%i%i%i",&t,&l,&r);
        /*
        for(int j=0;j<=n;j++)
            cout<<j<<" -> "<<score(j,t)<<endl;
        */

        printf("%i\n",first_valid(l,t)-last_valid(r,t)+1);
    }
    return 0;
}

Compilation message

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |     scanf("%i%i",&n,&q);
      |     ~~~~~^~~~~~~~~~~~~~
worst_reporter3.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |         scanf("%i",&inp[i]);
      |         ~~~~~^~~~~~~~~~~~~~
worst_reporter3.cpp:72:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   72 |         scanf("%i%i%i",&t,&l,&r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 884 ms 24728 KB Output is correct
2 Correct 933 ms 24696 KB Output is correct
3 Correct 946 ms 24696 KB Output is correct
4 Correct 953 ms 24824 KB Output is correct
5 Correct 890 ms 24704 KB Output is correct
6 Correct 942 ms 24728 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct

Subtask #3
81.0 / 81.0

# Verdict Execution time Memory Grader output
1 Correct 884 ms 24728 KB Output is correct
2 Correct 933 ms 24696 KB Output is correct
3 Correct 946 ms 24696 KB Output is correct
4 Correct 953 ms 24824 KB Output is correct
5 Correct 890 ms 24704 KB Output is correct
6 Correct 942 ms 24728 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 561 ms 23220 KB Output is correct
14 Correct 580 ms 24164 KB Output is correct
15 Correct 556 ms 22524 KB Output is correct
16 Correct 552 ms 23036 KB Output is correct
17 Correct 643 ms 27256 KB Output is correct
18 Correct 677 ms 27256 KB Output is correct
19 Correct 635 ms 27296 KB Output is correct
20 Correct 659 ms 27256 KB Output is correct
21 Correct 667 ms 27384 KB Output is correct
22 Correct 724 ms 27384 KB Output is correct
23 Correct 673 ms 27408 KB Output is correct
24 Correct 646 ms 27384 KB Output is correct
25 Correct 900 ms 24700 KB Output is correct
26 Correct 896 ms 24824 KB Output is correct
27 Correct 700 ms 26848 KB Output is correct
28 Correct 692 ms 27180 KB Output is correct
29 Correct 676 ms 26744 KB Output is correct
30 Correct 752 ms 26848 KB Output is correct
31 Correct 714 ms 27004 KB Output is correct
32 Correct 707 ms 23480 KB Output is correct
33 Correct 1 ms 384 KB Output is correct