oj.uz

Submission #180308

# Submission time Handle Problem Language Result Execution time Memory
180308 2020-01-08T20:14:06 Z Akashi Worst Reporter 3 (JOI18_worst_reporter3) C++14
100 / 100
 709 ms 25504 KB 
#include <bits/stdc++.h>
using namespace std;

const int INF = 1e9 + 1e6;

int n, q;
int d[500005], ad[500005];

inline int get_pos(int t, int i){
    int wh = t / d[i];
    return wh * d[i] - ad[i];
}

inline int count_kids(int t, int x){
    int st = 1, dr = n;
    while(st <= dr){
        int mij = (st + dr) / 2;
        if(get_pos(t, mij) <= x) st = mij + 1;
        else dr = mij - 1;
    }

    return dr;
}

int main()
{
    scanf("%d%d", &n, &q);

    d[1] = 1; ++n;
    ad[1] = 0;
    for(int i = 2; i <= n ; ++i){
        scanf("%d", &d[i]);
        ad[i] = i - 1;
        int k = d[i] / d[i - 1];
        if(d[i] % d[i - 1]) ++k;
        if(1LL * d[i - 1] * k >= INF) d[i] = INF;
        else d[i] = d[i - 1] * k;
    }

    for(int i = 1; i <= n / 2 ; ++i) swap(d[i], d[n - i + 1]), swap(ad[i], ad[n - i + 1]);

    int t, l, r;
    while(q--){
        scanf("%d%d%d", &t, &l, &r);
        if(l > t) {printf("0\n"); continue ;}

        r = min(r, t);
        int nr = count_kids(t, r) - count_kids(t, l - 1);
        printf("%d\n", nr);
    }

    return 0;
}

Compilation message

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &q);
     ~~~~~^~~~~~~~~~~~~~~~
worst_reporter3.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &d[i]);
         ~~~~~^~~~~~~~~~~~~
worst_reporter3.cpp:44:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &t, &l, &r);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 687 ms 22808 KB Output is correct
2 Correct 690 ms 22864 KB Output is correct
3 Correct 690 ms 22752 KB Output is correct
4 Correct 682 ms 22776 KB Output is correct
5 Correct 686 ms 22968 KB Output is correct
6 Correct 686 ms 22924 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 380 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct

Subtask #3
81.0 / 81.0

# Verdict Execution time Memory Grader output
1 Correct 687 ms 22808 KB Output is correct
2 Correct 690 ms 22864 KB Output is correct
3 Correct 690 ms 22752 KB Output is correct
4 Correct 682 ms 22776 KB Output is correct
5 Correct 686 ms 22968 KB Output is correct
6 Correct 686 ms 22924 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 3 ms 380 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 452 ms 21468 KB Output is correct
14 Correct 458 ms 21808 KB Output is correct
15 Correct 435 ms 20728 KB Output is correct
16 Correct 453 ms 21112 KB Output is correct
17 Correct 584 ms 25464 KB Output is correct
18 Correct 585 ms 25336 KB Output is correct
19 Correct 579 ms 25416 KB Output is correct
20 Correct 582 ms 25336 KB Output is correct
21 Correct 586 ms 25504 KB Output is correct
22 Correct 591 ms 25460 KB Output is correct
23 Correct 605 ms 25268 KB Output is correct
24 Correct 586 ms 25332 KB Output is correct
25 Correct 709 ms 22720 KB Output is correct
26 Correct 705 ms 22940 KB Output is correct
27 Correct 622 ms 24896 KB Output is correct
28 Correct 613 ms 25172 KB Output is correct
29 Correct 616 ms 24696 KB Output is correct
30 Correct 645 ms 24824 KB Output is correct
31 Correct 621 ms 25284 KB Output is correct
32 Correct 541 ms 21368 KB Output is correct
33 Correct 2 ms 376 KB Output is correct