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Submission #171750

# Submission time Handle Problem Language Result Execution time Memory
171750 2019-12-30T09:21:17 Z Sensei Strange Device (APIO19_strange_device) C++17
65 / 100
 654 ms 19696 KB 
/*
	DATE:		2019-12-30 11:10:15
	NAME:		
	PROBLEM:	APIO19_strange_device
*/
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e6;
const long long LLINF = 1e18 + 100;

class Segment {
public:
	long long l, r;
	Segment() {}
	Segment(long long x, long long y) {
		l = x;
		r = y;
	}
};

long long f(long long x, long long y) {
	if (x / __gcd(x, y + 1) > LLINF / y) {
		return LLINF;
	}

	return x / __gcd(x, y + 1) * y;
}

int main() {
	int n;
	cin >> n;

	long long A, B;
	cin >> A >> B;

	long long C = f(A, B);

	vector<Segment> segments;

	for (int i = 1; i <= n; i++) {
		Segment segment;
		scanf("%lld %lld", &segment.l, &segment.r);

		segment.l %= C;
		segment.r %= C;

		if (segment.l <= segment.r) {
			segments.push_back(segment);
		}
		else {
			segments.push_back(Segment(0, segment.r));
			segments.push_back(Segment(segment.l, C - 1));
		}
	}

	sort(segments.begin(), segments.end(), [](Segment x, Segment y) {
		if (x.l == y.l) {
			return x.r < y.r;
		}

		return x.l < y.l;
	});

	long long lastr = -1;
	long long ans = 0;

	for (int i = 0; i < segments.size(); i++) {
		if (segments[i].l > lastr) {
			lastr = segments[i].l - 1;
		}

		if (segments[i].r > lastr) {
			ans += segments[i].r - lastr;
			lastr = segments[i].r;
		}
	}

	cout << ans << "\n";

	return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:69:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < segments.size(); i++) {
                  ~~^~~~~~~~~~~~~~~~~
strange_device.cpp:44:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld", &segment.l, &segment.r);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 8 ms 760 KB Output is correct
3 Correct 8 ms 636 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 276 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 8 ms 1144 KB Output is correct
17 Correct 66 ms 2640 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 392 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 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 380 KB Output is correct
5 Correct 429 ms 16896 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 604 ms 16980 KB Output is correct
3 Correct 577 ms 16832 KB Output is correct
4 Correct 555 ms 18768 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 604 ms 16980 KB Output is correct
3 Correct 577 ms 16832 KB Output is correct
4 Correct 555 ms 18768 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 570 ms 17300 KB Output is correct
7 Correct 590 ms 17804 KB Output is correct
8 Correct 582 ms 17852 KB Output is correct
9 Correct 637 ms 17504 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 604 ms 16980 KB Output is correct
3 Correct 577 ms 16832 KB Output is correct
4 Correct 555 ms 18768 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 58 ms 5732 KB Output is correct
7 Correct 62 ms 5604 KB Output is correct
8 Correct 56 ms 5604 KB Output is correct
9 Correct 59 ms 5368 KB Output is correct
10 Correct 58 ms 5604 KB Output is correct
11 Correct 60 ms 5604 KB Output is correct
12 Correct 56 ms 5604 KB Output is correct
13 Correct 62 ms 5228 KB Output is correct
14 Correct 57 ms 5236 KB Output is correct
15 Correct 64 ms 5604 KB Output is correct
16 Correct 63 ms 5604 KB Output is correct
17 Correct 60 ms 5576 KB Output is correct
18 Correct 591 ms 17492 KB Output is correct
19 Correct 563 ms 17392 KB Output is correct
20 Correct 650 ms 17380 KB Output is correct
21 Correct 62 ms 4968 KB Output is correct
22 Correct 53 ms 4972 KB Output is correct
23 Correct 206 ms 9536 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 63 ms 2800 KB Output is correct
3 Correct 62 ms 2800 KB Output is correct
4 Correct 649 ms 18444 KB Output is correct
5 Correct 61 ms 2796 KB Output is correct
6 Correct 60 ms 2792 KB Output is correct
7 Correct 62 ms 2796 KB Output is correct
8 Correct 64 ms 2776 KB Output is correct
9 Correct 60 ms 2700 KB Output is correct
10 Correct 60 ms 2796 KB Output is correct
11 Correct 62 ms 2920 KB Output is correct
12 Correct 52 ms 2792 KB Output is correct
13 Correct 63 ms 2796 KB Output is correct
14 Correct 654 ms 19696 KB Output is correct
15 Correct 62 ms 2792 KB Output is correct
16 Correct 582 ms 18116 KB Output is correct
17 Correct 572 ms 17044 KB Output is correct
18 Correct 2 ms 252 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 8 ms 760 KB Output is correct
3 Correct 8 ms 636 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 276 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 8 ms 1144 KB Output is correct
17 Correct 66 ms 2640 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 392 KB Output is correct
20 Incorrect 2 ms 376 KB Output isn't correct
21 Halted 0 ms 0 KB -