답안 #20558 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
20558	2017-02-12T10:18:59 Z	CodingAmolang(#71, sys7961)	초음속철도 (OJUZ11_rail)	C++11	70 / 100	3000 ms	12752 KB

rail

#include<stdio.h>
#include<vector>
#include<algorithm>
#include<queue>
#include<string.h>
using std::queue;
using std::vector;
const long long MOD = 1000000007;
using std::pair;
long long di[400100];
int sz = 800;
long long start[1000];
long long end[1000];
int cnt[1000];
long long sum[1000];
long long arr[400100];

long long poww(long long a, long long b) {
	if (b == 0)return 1;
	long long tmp = poww(a, b / 2);
	if (b % 2 == 1)return (((tmp*tmp) % MOD)*a) % MOD;
	return (tmp*tmp) % MOD;
}
int main() {
	int n, m;
	scanf("%d%d", &n, &m);
	vector<int> X = { 1,n };
	vector<pair<int, int>> seg;
	for (int i = 0; i < m; i++) {
		int s, e;
		scanf("%d%d", &s, &e);
		seg.push_back({ s,e });
		X.push_back(s);
		X.push_back(e);
	}
	std::sort(seg.begin(), seg.end());
	std::sort(X.begin(), X.end());
	X.erase(std::unique(X.begin(), X.end()), X.end());
	memset(start, 0xff, sizeof(start));
	for (int i = 0; i < X.size(); i++) {
		di[i] = i / sz;
		if (start[di[i]] == -1)start[di[i]] = i;
		end[di[i]] = i;
	}
	sum[di[0]]++;
	arr[0]++;
	for (auto segment : seg) {
		int s = std::lower_bound(X.begin(), X.end(), segment.first) - X.begin();
		int e = std::lower_bound(X.begin(), X.end(), segment.second) - X.begin();
		long long S = 0;
		for (int i = s; i <= e; i++) {
			if (start[di[i]] == i && end[di[i]]<=e) {
				S += sum[di[i]];
				S %= MOD;
				i = end[di[i]];
				continue;
			}
			else if(cnt[di[i]]!=0){
				for (int k = start[di[i]]; k <= end[di[i]]; k++) {
					arr[k] *= poww(2, cnt[di[k]]);
					arr[k] %= MOD;
				}
				cnt[di[i]] = 0;
			}
			S += arr[i];
			S %= MOD;

		}
		if (cnt[di[e]] != 0) {
			for (int i = start[di[e]]; i <= end[di[e]]; i++) {
				arr[i] *=poww(2,cnt[di[i]]);
				arr[i] %= MOD;
			}
			cnt[di[e]] = 0;
		}
		arr[e] += S;
		arr[e] %= MOD;
		sum[di[e]] += S;
		sum[di[e]] %= MOD;
		for (int i = e + 1; i <= X.size() - 1; i++) {
			if (start[di[i]] == i && end[di[i]] <= X.size()-1) {
				cnt[di[i]]++;
				sum[di[i]] *= 2;
				sum[di[i]] %= MOD;
				i = end[di[i]];
				continue;
			}
			sum[di[i]] += arr[i];
			sum[di[i]] %= MOD;
			arr[i] *= 2;
			arr[i] %= MOD;
		}
	}
	arr[X.size() - 1] *= poww(2,cnt[di[X.size()-1]]) % MOD;
	arr[X.size() - 1] %= MOD;
	printf("%lld", arr[X.size() - 1]);
}

Compilation message

rail.cpp: In function 'int main()':
rail.cpp:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < X.size(); i++) {
                    ^
rail.cpp:80:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = e + 1; i <= X.size() - 1; i++) {
                         ^
rail.cpp:81:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (start[di[i]] == i && end[di[i]] <= X.size()-1) {
                                        ^
rail.cpp:26:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
                       ^
rail.cpp:31:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &s, &e);
                        ^

Subtask #1
10.0 / 10.0

#	결과	메모리	Grader output
1	Correct	7460 KB	Output is correct
2	Correct	7460 KB	Output is correct
3	Correct	7460 KB	Output is correct
4	Correct	7460 KB	Output is correct
5	Correct	7460 KB	Output is correct
6	Correct	7460 KB	Output is correct
7	Correct	7460 KB	Output is correct
8	Correct	7460 KB	Output is correct
9	Correct	7460 KB	Output is correct
10	Correct	7460 KB	Output is correct
11	Correct	7460 KB	Output is correct
12	Correct	7460 KB	Output is correct
13	Correct	7460 KB	Output is correct
14	Correct	7460 KB	Output is correct
15	Correct	7460 KB	Output is correct
16	Correct	7460 KB	Output is correct
17	Correct	7460 KB	Output is correct
18	Correct	7460 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	메모리	Grader output
1	Correct	7460 KB	Output is correct
2	Correct	7460 KB	Output is correct
3	Correct	7460 KB	Output is correct
4	Correct	7460 KB	Output is correct
5	Correct	7460 KB	Output is correct
6	Correct	7460 KB	Output is correct
7	Correct	7460 KB	Output is correct
8	Correct	7460 KB	Output is correct
9	Correct	7460 KB	Output is correct
10	Correct	7460 KB	Output is correct
11	Correct	7460 KB	Output is correct
12	Correct	7460 KB	Output is correct
13	Correct	7460 KB	Output is correct
14	Correct	7460 KB	Output is correct
15	Correct	7460 KB	Output is correct
16	Correct	7460 KB	Output is correct
17	Correct	7460 KB	Output is correct
18	Correct	7460 KB	Output is correct
19	Correct	7460 KB	Output is correct
20	Correct	7460 KB	Output is correct
21	Correct	7460 KB	Output is correct
22	Correct	7460 KB	Output is correct
23	Correct	7460 KB	Output is correct
24	Correct	7460 KB	Output is correct
25	Correct	7460 KB	Output is correct
26	Correct	7460 KB	Output is correct
27	Correct	7460 KB	Output is correct
28	Correct	7460 KB	Output is correct
29	Correct	7460 KB	Output is correct
30	Correct	7460 KB	Output is correct
31	Correct	7460 KB	Output is correct
32	Correct	7460 KB	Output is correct
33	Correct	7460 KB	Output is correct
34	Correct	7460 KB	Output is correct
35	Correct	7460 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	7460 KB	Output is correct
2	Correct	0 ms	7460 KB	Output is correct
3	Correct	0 ms	7460 KB	Output is correct
4	Correct	19 ms	7620 KB	Output is correct
5	Correct	889 ms	12752 KB	Output is correct
6	Correct	1443 ms	12752 KB	Output is correct
7	Correct	1449 ms	12752 KB	Output is correct
8	Correct	0 ms	7460 KB	Output is correct
9	Correct	1256 ms	12752 KB	Output is correct
10	Correct	1359 ms	12752 KB	Output is correct
11	Correct	759 ms	10192 KB	Output is correct
12	Correct	1403 ms	12752 KB	Output is correct
13	Correct	1353 ms	12752 KB	Output is correct
14	Correct	66 ms	12752 KB	Output is correct
15	Correct	1119 ms	12752 KB	Output is correct
16	Correct	76 ms	12752 KB	Output is correct
17	Correct	1396 ms	12752 KB	Output is correct
18	Correct	1403 ms	12752 KB	Output is correct
19	Correct	1369 ms	12752 KB	Output is correct

Subtask #4
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	7460 KB	Output is correct
2	Correct	0 ms	7460 KB	Output is correct
3	Correct	0 ms	7460 KB	Output is correct
4	Correct	0 ms	7460 KB	Output is correct
5	Correct	0 ms	7460 KB	Output is correct
6	Correct	0 ms	7460 KB	Output is correct
7	Correct	0 ms	7460 KB	Output is correct
8	Correct	0 ms	7460 KB	Output is correct
9	Correct	0 ms	7460 KB	Output is correct
10	Correct	0 ms	7460 KB	Output is correct
11	Correct	0 ms	7460 KB	Output is correct
12	Correct	0 ms	7460 KB	Output is correct
13	Correct	0 ms	7460 KB	Output is correct
14	Correct	0 ms	7460 KB	Output is correct
15	Correct	0 ms	7460 KB	Output is correct
16	Correct	0 ms	7460 KB	Output is correct
17	Correct	0 ms	7460 KB	Output is correct
18	Correct	0 ms	7460 KB	Output is correct
19	Correct	0 ms	7460 KB	Output is correct
20	Correct	0 ms	7460 KB	Output is correct
21	Correct	0 ms	7460 KB	Output is correct
22	Correct	0 ms	7460 KB	Output is correct
23	Correct	0 ms	7460 KB	Output is correct
24	Correct	0 ms	7460 KB	Output is correct
25	Correct	0 ms	7460 KB	Output is correct
26	Correct	0 ms	7460 KB	Output is correct
27	Correct	0 ms	7460 KB	Output is correct
28	Correct	0 ms	7460 KB	Output is correct
29	Correct	0 ms	7460 KB	Output is correct
30	Correct	0 ms	7460 KB	Output is correct
31	Correct	0 ms	7460 KB	Output is correct
32	Correct	0 ms	7460 KB	Output is correct
33	Correct	0 ms	7460 KB	Output is correct
34	Correct	0 ms	7460 KB	Output is correct
35	Correct	0 ms	7460 KB	Output is correct
36	Correct	103 ms	7620 KB	Output is correct
37	Correct	79 ms	7620 KB	Output is correct
38	Correct	46 ms	7620 KB	Output is correct
39	Correct	0 ms	7620 KB	Output is correct
40	Correct	19 ms	7620 KB	Output is correct
41	Correct	86 ms	7620 KB	Output is correct
42	Correct	99 ms	7620 KB	Output is correct
43	Correct	0 ms	7460 KB	Output is correct
44	Correct	53 ms	7620 KB	Output is correct
45	Correct	0 ms	7620 KB	Output is correct
46	Correct	26 ms	7620 KB	Output is correct
47	Correct	66 ms	7620 KB	Output is correct
48	Correct	66 ms	7620 KB	Output is correct
49	Correct	3 ms	7620 KB	Output is correct
50	Correct	3 ms	7620 KB	Output is correct
51	Correct	3 ms	7620 KB	Output is correct
52	Correct	9 ms	7460 KB	Output is correct
53	Correct	89 ms	7620 KB	Output is correct
54	Correct	36 ms	7620 KB	Output is correct
55	Correct	109 ms	7620 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	7460 KB	Output is correct
2	Correct	0 ms	7460 KB	Output is correct
3	Correct	0 ms	7460 KB	Output is correct
4	Correct	0 ms	7460 KB	Output is correct
5	Correct	0 ms	7460 KB	Output is correct
6	Correct	0 ms	7460 KB	Output is correct
7	Correct	0 ms	7460 KB	Output is correct
8	Correct	0 ms	7460 KB	Output is correct
9	Correct	0 ms	7460 KB	Output is correct
10	Correct	0 ms	7460 KB	Output is correct
11	Correct	0 ms	7460 KB	Output is correct
12	Correct	0 ms	7460 KB	Output is correct
13	Correct	0 ms	7460 KB	Output is correct
14	Correct	0 ms	7460 KB	Output is correct
15	Correct	0 ms	7460 KB	Output is correct
16	Correct	0 ms	7460 KB	Output is correct
17	Correct	0 ms	7460 KB	Output is correct
18	Correct	0 ms	7460 KB	Output is correct
19	Correct	0 ms	7460 KB	Output is correct
20	Correct	0 ms	7460 KB	Output is correct
21	Correct	0 ms	7460 KB	Output is correct
22	Correct	0 ms	7460 KB	Output is correct
23	Correct	0 ms	7460 KB	Output is correct
24	Correct	0 ms	7460 KB	Output is correct
25	Correct	0 ms	7460 KB	Output is correct
26	Correct	0 ms	7460 KB	Output is correct
27	Correct	0 ms	7460 KB	Output is correct
28	Correct	0 ms	7460 KB	Output is correct
29	Correct	0 ms	7460 KB	Output is correct
30	Correct	0 ms	7460 KB	Output is correct
31	Correct	0 ms	7460 KB	Output is correct
32	Correct	0 ms	7460 KB	Output is correct
33	Correct	0 ms	7460 KB	Output is correct
34	Correct	0 ms	7460 KB	Output is correct
35	Correct	0 ms	7460 KB	Output is correct
36	Correct	0 ms	7460 KB	Output is correct
37	Correct	0 ms	7460 KB	Output is correct
38	Correct	0 ms	7460 KB	Output is correct
39	Correct	19 ms	7620 KB	Output is correct
40	Correct	889 ms	12752 KB	Output is correct
41	Correct	1443 ms	12752 KB	Output is correct
42	Correct	1449 ms	12752 KB	Output is correct
43	Correct	0 ms	7460 KB	Output is correct
44	Correct	1256 ms	12752 KB	Output is correct
45	Correct	1359 ms	12752 KB	Output is correct
46	Correct	759 ms	10192 KB	Output is correct
47	Correct	1403 ms	12752 KB	Output is correct
48	Correct	1353 ms	12752 KB	Output is correct
49	Correct	66 ms	12752 KB	Output is correct
50	Correct	1119 ms	12752 KB	Output is correct
51	Correct	76 ms	12752 KB	Output is correct
52	Correct	1396 ms	12752 KB	Output is correct
53	Correct	1403 ms	12752 KB	Output is correct
54	Correct	1369 ms	12752 KB	Output is correct
55	Correct	103 ms	7620 KB	Output is correct
56	Correct	79 ms	7620 KB	Output is correct
57	Correct	46 ms	7620 KB	Output is correct
58	Correct	0 ms	7620 KB	Output is correct
59	Correct	19 ms	7620 KB	Output is correct
60	Correct	86 ms	7620 KB	Output is correct
61	Correct	99 ms	7620 KB	Output is correct
62	Correct	0 ms	7460 KB	Output is correct
63	Correct	53 ms	7620 KB	Output is correct
64	Correct	0 ms	7620 KB	Output is correct
65	Correct	26 ms	7620 KB	Output is correct
66	Correct	66 ms	7620 KB	Output is correct
67	Correct	66 ms	7620 KB	Output is correct
68	Correct	3 ms	7620 KB	Output is correct
69	Correct	3 ms	7620 KB	Output is correct
70	Correct	3 ms	7620 KB	Output is correct
71	Correct	9 ms	7460 KB	Output is correct
72	Correct	89 ms	7620 KB	Output is correct
73	Correct	36 ms	7620 KB	Output is correct
74	Correct	109 ms	7620 KB	Output is correct
75	Execution timed out	3000 ms	12752 KB	Execution timed out
76	Execution timed out	3000 ms	11728 KB	Execution timed out
77	Correct	1706 ms	12752 KB	Output is correct
78	Correct	59 ms	12752 KB	Output is correct
79	Execution timed out	3000 ms	12752 KB	Execution timed out
80	Execution timed out	3000 ms	12752 KB	Execution timed out
81	Correct	69 ms	7620 KB	Output is correct
82	Execution timed out	3000 ms	12752 KB	Execution timed out
83	Correct	59 ms	12752 KB	Output is correct
84	Execution timed out	3000 ms	12752 KB	Execution timed out
85	Execution timed out	3000 ms	12752 KB	Execution timed out
86	Execution timed out	3000 ms	12752 KB	Execution timed out
87	Correct	149 ms	12752 KB	Output is correct
88	Correct	139 ms	12752 KB	Output is correct
89	Execution timed out	3000 ms	12752 KB	Execution timed out
90	Execution timed out	3000 ms	12752 KB	Execution timed out
91	Execution timed out	3000 ms	12752 KB	Execution timed out
92	Execution timed out	3000 ms	12752 KB	Execution timed out
93	Execution timed out	3000 ms	12752 KB	Execution timed out
94	Execution timed out	3000 ms	12752 KB	Execution timed out
95	Execution timed out	3000 ms	12752 KB	Execution timed out

답안 #20558

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 8.0 / 8.0

Subtask #3 25.0 / 25.0

Subtask #4 27.0 / 27.0

Subtask #5 0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
8.0 / 8.0

Subtask #3
25.0 / 25.0

Subtask #4
27.0 / 27.0

Subtask #5
0 / 30.0