oj.uz

Submission #154251

# Submission time Handle Problem Language Result Execution time Memory
154251 2019-09-19T15:23:42 Z karma Worst Reporter 3 (JOI18_worst_reporter3) C++14
100 / 100
 624 ms 23464 KB 
#include<bits/stdc++.h>
#define Task     "test"
#define ll       long long
#define pb       emplace_back

using namespace std;

const int N = int(5e5) + 5;

int n, q, a[N], t, l, r, low, high, mid, ans;

bool Check(int x, bool type) {
    int pos = (t / a[x]) * a[x] - x - 1;
    if(type) return pos <= r;
    return pos >= l;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    if(fopen(Task".inp", "r")) {
        freopen(Task".inp", "r", stdin);
        freopen(Task".out", "w", stdout);
    }
    cin >> n >> q;
    for(int i = 0; i < n; ++i) {
        cin >> a[i];
        if(i) a[i] = ((a[i] - 1) / a[i - 1] + 1) * a[i - 1];
    }
    while(q --) {
        cin >> t >> l >> r;
        if(t >= l && t <= r) ans = 1;
        else ans = 0;
        low = 0, high = n - 1;
        while(low <= high) {
            mid = (low + high) >> 1;
            if(Check(mid, 0)) low = mid + 1;
            else high = mid - 1;
        }
        if(high < 0) {cout << ans << "\n"; continue;}
        ans += low, low = 0, high = n - 1;
        while(low <= high) {
            mid = (low + high) >> 1;
            if(Check(mid, 1)) high = mid - 1;
            else low = mid + 1;
        }
        cout << ans - low << '\n';
    }
}

Compilation message

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
worst_reporter3.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 601 ms 20856 KB Output is correct
2 Correct 608 ms 20808 KB Output is correct
3 Correct 607 ms 20764 KB Output is correct
4 Correct 606 ms 20984 KB Output is correct
5 Correct 608 ms 20868 KB Output is correct
6 Correct 614 ms 20880 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 376 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 292 KB Output is correct

Subtask #3
81.0 / 81.0

# Verdict Execution time Memory Grader output
1 Correct 601 ms 20856 KB Output is correct
2 Correct 608 ms 20808 KB Output is correct
3 Correct 607 ms 20764 KB Output is correct
4 Correct 606 ms 20984 KB Output is correct
5 Correct 608 ms 20868 KB Output is correct
6 Correct 614 ms 20880 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 3 ms 376 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 292 KB Output is correct
13 Correct 385 ms 19392 KB Output is correct
14 Correct 398 ms 19884 KB Output is correct
15 Correct 339 ms 18564 KB Output is correct
16 Correct 375 ms 19164 KB Output is correct
17 Correct 519 ms 23448 KB Output is correct
18 Correct 525 ms 23416 KB Output is correct
19 Correct 511 ms 23424 KB Output is correct
20 Correct 517 ms 23420 KB Output is correct
21 Correct 517 ms 23320 KB Output is correct
22 Correct 523 ms 23444 KB Output is correct
23 Correct 552 ms 23276 KB Output is correct
24 Correct 516 ms 23464 KB Output is correct
25 Correct 618 ms 20876 KB Output is correct
26 Correct 624 ms 20800 KB Output is correct
27 Correct 553 ms 22964 KB Output is correct
28 Correct 554 ms 23280 KB Output is correct
29 Correct 536 ms 22876 KB Output is correct
30 Correct 552 ms 22904 KB Output is correct
31 Correct 545 ms 23160 KB Output is correct
32 Correct 500 ms 19420 KB Output is correct
33 Correct 2 ms 376 KB Output is correct