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Submission #153895

# Submission time Handle Problem Language Result Execution time Memory
153895 2019-09-17T11:11:13 Z DystoriaX Strange Device (APIO19_strange_device) C++14
65 / 100
 637 ms 17216 KB 
#include <bits/stdc++.h>

using namespace std;

int n;
long long a, b, mx;
const long long inf = 2e18;
vector<pair<long long, long long> > seg;

long long gcd(long long a, long long b){
    if(b == 0) return a;
    return gcd(b, a % b);
}

int main(){
    scanf("%d%lld%lld", &n, &a, &b);

    mx = a / gcd(a, b + 1);

    if(inf / mx < b){
        mx = 1e18;
    } else mx *= b;

    for(int i = 0; i < n; i++){
        long long l, r;
        scanf("%lld%lld", &l, &r);

        l %= mx, r %= mx;

        if(r - l + 1 >= mx){
            seg.emplace_back(0, mx - 1);
        } else if (l <= r){
            seg.emplace_back(l, r);
        } else {
            seg.emplace_back(l, mx - 1);
            seg.emplace_back(0, r);
        }
    }

    sort(seg.begin(), seg.end());

    long long ans = 0, last = 0;

    for(auto k : seg){
        ans += max(0LL, k.second - max(last, k.first) + 1);
        last = max(last, k.second + 1);
    }

    printf("%lld\n", ans);
    
    return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%lld%lld", &n, &a, &b);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld", &l, &r);
         ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 7 ms 888 KB Output is correct
3 Correct 8 ms 760 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 9 ms 888 KB Output is correct
17 Correct 64 ms 2860 KB Output is correct
18 Correct 2 ms 256 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Incorrect 2 ms 376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 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 430 ms 17216 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 392 KB Output is correct
2 Correct 576 ms 17132 KB Output is correct
3 Correct 558 ms 17076 KB Output is correct
4 Correct 531 ms 16948 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 392 KB Output is correct
2 Correct 576 ms 17132 KB Output is correct
3 Correct 558 ms 17076 KB Output is correct
4 Correct 531 ms 16948 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 549 ms 16960 KB Output is correct
7 Correct 576 ms 16968 KB Output is correct
8 Correct 559 ms 16940 KB Output is correct
9 Correct 592 ms 16956 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 392 KB Output is correct
2 Correct 576 ms 17132 KB Output is correct
3 Correct 558 ms 17076 KB Output is correct
4 Correct 531 ms 16948 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 57 ms 2640 KB Output is correct
7 Correct 60 ms 2648 KB Output is correct
8 Correct 53 ms 2568 KB Output is correct
9 Correct 55 ms 2668 KB Output is correct
10 Correct 56 ms 2664 KB Output is correct
11 Correct 59 ms 2656 KB Output is correct
12 Correct 54 ms 2664 KB Output is correct
13 Correct 60 ms 2664 KB Output is correct
14 Correct 56 ms 2584 KB Output is correct
15 Correct 62 ms 2584 KB Output is correct
16 Correct 61 ms 2664 KB Output is correct
17 Correct 56 ms 2668 KB Output is correct
18 Correct 565 ms 16968 KB Output is correct
19 Correct 551 ms 16916 KB Output is correct
20 Correct 637 ms 17028 KB Output is correct
21 Correct 61 ms 2664 KB Output is correct
22 Correct 54 ms 2684 KB Output is correct
23 Correct 215 ms 8628 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 62 ms 2748 KB Output is correct
3 Correct 62 ms 2876 KB Output is correct
4 Correct 618 ms 17124 KB Output is correct
5 Correct 58 ms 2800 KB Output is correct
6 Correct 59 ms 2820 KB Output is correct
7 Correct 58 ms 2544 KB Output is correct
8 Correct 63 ms 2540 KB Output is correct
9 Correct 60 ms 2812 KB Output is correct
10 Correct 59 ms 2792 KB Output is correct
11 Correct 61 ms 2712 KB Output is correct
12 Correct 53 ms 2728 KB Output is correct
13 Correct 61 ms 2664 KB Output is correct
14 Correct 617 ms 16808 KB Output is correct
15 Correct 60 ms 2544 KB Output is correct
16 Correct 565 ms 16876 KB Output is correct
17 Correct 552 ms 16940 KB Output is correct
18 Correct 2 ms 376 KB Output is correct

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 7 ms 888 KB Output is correct
3 Correct 8 ms 760 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 9 ms 888 KB Output is correct
17 Correct 64 ms 2860 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Incorrect 2 ms 376 KB Output isn't correct
21 Halted 0 ms 0 KB -