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Submission #171729

# Submission time Handle Problem Language Result Execution time Memory
171729 2019-12-30T08:31:39 Z Sensei Strange Device (APIO19_strange_device) C++17
5 / 100
 660 ms 46388 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) > LLINF / y) {
		return LLINF;
	}

	return x * 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
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 8 ms 888 KB Output is correct
3 Correct 8 ms 1148 KB Output is correct
4 Incorrect 2 ms 376 KB Output isn't correct
5 Halted 0 ms 0 KB -

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 380 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 454 ms 41248 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 598 ms 36392 KB Output is correct
3 Incorrect 593 ms 33580 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 598 ms 36392 KB Output is correct
3 Incorrect 593 ms 33580 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 598 ms 36392 KB Output is correct
3 Incorrect 593 ms 33580 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 63 ms 5228 KB Output is correct
3 Correct 62 ms 5732 KB Output is correct
4 Correct 660 ms 39916 KB Output is correct
5 Correct 61 ms 5736 KB Output is correct
6 Correct 62 ms 5848 KB Output is correct
7 Correct 62 ms 5736 KB Output is correct
8 Correct 64 ms 5732 KB Output is correct
9 Correct 61 ms 5772 KB Output is correct
10 Correct 61 ms 5732 KB Output is correct
11 Correct 63 ms 5900 KB Output is correct
12 Correct 53 ms 5732 KB Output is correct
13 Correct 62 ms 5736 KB Output is correct
14 Correct 655 ms 46388 KB Output is correct
15 Incorrect 66 ms 5732 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 8 ms 888 KB Output is correct
3 Correct 8 ms 1148 KB Output is correct
4 Incorrect 2 ms 376 KB Output isn't correct
5 Halted 0 ms 0 KB -