Submission #1044679

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1044679	2024-08-05T12:20:18 Z	vjudge1	Strange Device (APIO19_strange_device)	C++17	100 / 100	427 ms	69976 KB

strange_device

#include <bits/stdc++.h>

using i64 = long long;

#ifdef DEBUG
	#include "debug.h"
#else 
	#define debug(...) void(23)
#endif

constexpr i64 INF = 2E18;

int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr);

	int N;
	i64 A, B;
	std::cin >> N >> A >> B;
	std::vector<i64> L(N), R(N);
	for(int i = 0; i < N; ++i) {
		std::cin >> L[i] >> R[i];
	}

	i64 ans = 0;
	for(int i = 0; i < N; ++i) {
		ans += R[i] - L[i] + 1;
	}

	{
		i64 b = B + 1;
		i64 g = std::gcd(A, b);
		A /= g;
	}

	// B * A >= INF
	if(B >= (INF + A - 1) / A) {
		std::cout << ans << '\n';
		return 0;
	}

	i64 search = B * A;

	debug(search);

	std::vector<std::pair<i64, int>> g;
	for(int i = 0; i < N; ++i) {
		if(R[i] - L[i] + 1 >= search) {
			std::cout << search << '\n';
			return 0;
		}
		if(L[i] % search < (R[i] + 1) % search) {
			g.emplace_back(L[i] % search, +1);
			g.emplace_back((R[i] + 1) % search, -1);
		} else {
			g.emplace_back(L[i] % search, +1);
			g.emplace_back(search, -1);
			g.emplace_back(0, +1);
			g.emplace_back((R[i] + 1) % search, -1);
		}
	}

	std::sort(g.begin(), g.end());

	debug(g);

	i64 last = 0, nw = 0;
	ans = 0;
	for(auto[x, d] : g) {
		if(nw > 0) {
			debug(last, x);
			ans += x - last;
		}
		nw += d;
		last = x;
	}

	std::cout << ans << '\n';

	return 0;
}

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	3 ms	1244 KB	Output is correct
3	Correct	3 ms	1252 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	432 KB	Output is correct
16	Correct	4 ms	1240 KB	Output is correct
17	Correct	35 ms	7124 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct

Subtask #2
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct

Subtask #3
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	180 ms	50020 KB	Output is correct

Subtask #4
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	298 ms	49244 KB	Output is correct
3	Correct	301 ms	69328 KB	Output is correct
4	Correct	290 ms	68540 KB	Output is correct

Subtask #5
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	298 ms	49244 KB	Output is correct
3	Correct	301 ms	69328 KB	Output is correct
4	Correct	290 ms	68540 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	299 ms	69976 KB	Output is correct
7	Correct	303 ms	67912 KB	Output is correct
8	Correct	291 ms	68680 KB	Output is correct
9	Correct	339 ms	68540 KB	Output is correct

Subtask #6
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	298 ms	49244 KB	Output is correct
3	Correct	301 ms	69328 KB	Output is correct
4	Correct	290 ms	68540 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	28 ms	8556 KB	Output is correct
7	Correct	30 ms	9316 KB	Output is correct
8	Correct	28 ms	8660 KB	Output is correct
9	Correct	30 ms	8452 KB	Output is correct
10	Correct	26 ms	9684 KB	Output is correct
11	Correct	31 ms	9160 KB	Output is correct
12	Correct	36 ms	10196 KB	Output is correct
13	Correct	33 ms	9160 KB	Output is correct
14	Correct	29 ms	9080 KB	Output is correct
15	Correct	35 ms	10448 KB	Output is correct
16	Correct	33 ms	10196 KB	Output is correct
17	Correct	29 ms	9672 KB	Output is correct
18	Correct	316 ms	69824 KB	Output is correct
19	Correct	270 ms	69704 KB	Output is correct
20	Correct	338 ms	69076 KB	Output is correct
21	Correct	35 ms	8660 KB	Output is correct
22	Correct	26 ms	8904 KB	Output is correct
23	Correct	76 ms	29572 KB	Output is correct

Subtask #7
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	31 ms	7536 KB	Output is correct
3	Correct	33 ms	6612 KB	Output is correct
4	Correct	427 ms	69564 KB	Output is correct
5	Correct	33 ms	10452 KB	Output is correct
6	Correct	34 ms	9172 KB	Output is correct
7	Correct	33 ms	8404 KB	Output is correct
8	Correct	34 ms	9684 KB	Output is correct
9	Correct	33 ms	9160 KB	Output is correct
10	Correct	38 ms	8904 KB	Output is correct
11	Correct	33 ms	10356 KB	Output is correct
12	Correct	30 ms	10208 KB	Output is correct
13	Correct	36 ms	9572 KB	Output is correct
14	Correct	339 ms	67928 KB	Output is correct
15	Correct	35 ms	10180 KB	Output is correct
16	Correct	274 ms	68424 KB	Output is correct
17	Correct	294 ms	69208 KB	Output is correct
18	Correct	0 ms	344 KB	Output is correct

Subtask #8
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	3 ms	1244 KB	Output is correct
3	Correct	3 ms	1252 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	432 KB	Output is correct
16	Correct	4 ms	1240 KB	Output is correct
17	Correct	35 ms	7124 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	180 ms	50020 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	298 ms	49244 KB	Output is correct
31	Correct	301 ms	69328 KB	Output is correct
32	Correct	290 ms	68540 KB	Output is correct
33	Correct	0 ms	344 KB	Output is correct
34	Correct	299 ms	69976 KB	Output is correct
35	Correct	303 ms	67912 KB	Output is correct
36	Correct	291 ms	68680 KB	Output is correct
37	Correct	339 ms	68540 KB	Output is correct
38	Correct	1 ms	348 KB	Output is correct
39	Correct	28 ms	8556 KB	Output is correct
40	Correct	30 ms	9316 KB	Output is correct
41	Correct	28 ms	8660 KB	Output is correct
42	Correct	30 ms	8452 KB	Output is correct
43	Correct	26 ms	9684 KB	Output is correct
44	Correct	31 ms	9160 KB	Output is correct
45	Correct	36 ms	10196 KB	Output is correct
46	Correct	33 ms	9160 KB	Output is correct
47	Correct	29 ms	9080 KB	Output is correct
48	Correct	35 ms	10448 KB	Output is correct
49	Correct	33 ms	10196 KB	Output is correct
50	Correct	29 ms	9672 KB	Output is correct
51	Correct	316 ms	69824 KB	Output is correct
52	Correct	270 ms	69704 KB	Output is correct
53	Correct	338 ms	69076 KB	Output is correct
54	Correct	35 ms	8660 KB	Output is correct
55	Correct	26 ms	8904 KB	Output is correct
56	Correct	76 ms	29572 KB	Output is correct
57	Correct	0 ms	348 KB	Output is correct
58	Correct	31 ms	7536 KB	Output is correct
59	Correct	33 ms	6612 KB	Output is correct
60	Correct	427 ms	69564 KB	Output is correct
61	Correct	33 ms	10452 KB	Output is correct
62	Correct	34 ms	9172 KB	Output is correct
63	Correct	33 ms	8404 KB	Output is correct
64	Correct	34 ms	9684 KB	Output is correct
65	Correct	33 ms	9160 KB	Output is correct
66	Correct	38 ms	8904 KB	Output is correct
67	Correct	33 ms	10356 KB	Output is correct
68	Correct	30 ms	10208 KB	Output is correct
69	Correct	36 ms	9572 KB	Output is correct
70	Correct	339 ms	67928 KB	Output is correct
71	Correct	35 ms	10180 KB	Output is correct
72	Correct	274 ms	68424 KB	Output is correct
73	Correct	294 ms	69208 KB	Output is correct
74	Correct	0 ms	344 KB	Output is correct
75	Correct	0 ms	348 KB	Output is correct
76	Correct	0 ms	348 KB	Output is correct
77	Correct	0 ms	348 KB	Output is correct
78	Correct	0 ms	348 KB	Output is correct
79	Correct	3 ms	1496 KB	Output is correct
80	Correct	353 ms	67924 KB	Output is correct
81	Correct	357 ms	69460 KB	Output is correct
82	Correct	335 ms	69056 KB	Output is correct
83	Correct	341 ms	67652 KB	Output is correct
84	Correct	349 ms	68040 KB	Output is correct
85	Correct	339 ms	67772 KB	Output is correct
86	Correct	76 ms	29812 KB	Output is correct
87	Correct	0 ms	344 KB	Output is correct

Submission #1044679

Compilation message