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Submission #153889

# Submission time Handle Problem Language Result Execution time Memory
153889 2019-09-17T10:55:49 Z DystoriaX Strange Device (APIO19_strange_device) C++14
65 / 100
 618 ms 19120 KB 
#include <bits/stdc++.h>

using namespace std;

int n;
long long a, b, mx;
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(log10l(mx) + log10l(b) > 18){
        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:15:10: 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:25:14: 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 256 KB Output is correct
2 Correct 8 ms 1144 KB Output is correct
3 Correct 8 ms 1016 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 380 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 424 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 296 KB Output is correct
16 Correct 8 ms 1016 KB Output is correct
17 Correct 65 ms 3936 KB Output is correct
18 Correct 2 ms 376 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 256 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 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 408 KB Output is correct
5 Correct 427 ms 18332 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 615 ms 18484 KB Output is correct
3 Correct 562 ms 17968 KB Output is correct
4 Correct 532 ms 17948 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 615 ms 18484 KB Output is correct
3 Correct 562 ms 17968 KB Output is correct
4 Correct 532 ms 17948 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 549 ms 17804 KB Output is correct
7 Correct 569 ms 18296 KB Output is correct
8 Correct 552 ms 18064 KB Output is correct
9 Correct 592 ms 17616 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 615 ms 18484 KB Output is correct
3 Correct 562 ms 17968 KB Output is correct
4 Correct 532 ms 17948 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 57 ms 3176 KB Output is correct
7 Correct 60 ms 3148 KB Output is correct
8 Correct 55 ms 3304 KB Output is correct
9 Correct 57 ms 2848 KB Output is correct
10 Correct 58 ms 2968 KB Output is correct
11 Correct 60 ms 2972 KB Output is correct
12 Correct 55 ms 3052 KB Output is correct
13 Correct 60 ms 2968 KB Output is correct
14 Correct 57 ms 3048 KB Output is correct
15 Correct 65 ms 3080 KB Output is correct
16 Correct 62 ms 2824 KB Output is correct
17 Correct 58 ms 2900 KB Output is correct
18 Correct 558 ms 16848 KB Output is correct
19 Correct 535 ms 17104 KB Output is correct
20 Correct 602 ms 18684 KB Output is correct
21 Correct 65 ms 4068 KB Output is correct
22 Correct 56 ms 4212 KB Output is correct
23 Correct 213 ms 11616 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 4328 KB Output is correct
3 Correct 62 ms 4068 KB Output is correct
4 Correct 618 ms 18480 KB Output is correct
5 Correct 62 ms 4196 KB Output is correct
6 Correct 61 ms 4352 KB Output is correct
7 Correct 61 ms 4196 KB Output is correct
8 Correct 65 ms 4196 KB Output is correct
9 Correct 59 ms 4196 KB Output is correct
10 Correct 60 ms 4264 KB Output is correct
11 Correct 62 ms 4396 KB Output is correct
12 Correct 54 ms 4472 KB Output is correct
13 Correct 64 ms 4456 KB Output is correct
14 Correct 604 ms 18824 KB Output is correct
15 Correct 62 ms 4332 KB Output is correct
16 Correct 565 ms 19036 KB Output is correct
17 Correct 553 ms 19120 KB Output is correct
18 Correct 2 ms 352 KB Output is correct

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 8 ms 1144 KB Output is correct
3 Correct 8 ms 1016 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 380 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 424 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 296 KB Output is correct
16 Correct 8 ms 1016 KB Output is correct
17 Correct 65 ms 3936 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Incorrect 2 ms 256 KB Output isn't correct
21 Halted 0 ms 0 KB -