답안 #20396 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
20396	2017-02-10T17:53:47 Z	윤지학(#34, gs13068)	초음속철도 (OJUZ11_rail)	C++	100 / 100	589 ms	29244 KB

rail

#include <cstdio>
#include <algorithm>

using namespace std;

const int P = 1000000007;

pair<int, int> a[200002];
int t[400004];

struct tree {
	tree *l, *r;
	int s, e, x, y;
} T[800008];
int Tn;

void Init(tree *p, int s, int e) {
	p->s = s;
	p->e = e;
	p->x = s == 1 && e == 1;
	p->y = 1;
	if (s != e) {
		p->l = T + ++Tn;
		Init(p->l, s, s + e >> 1);
		p->r = T + ++Tn;
		Init(p->r, (s + e >> 1) + 1, e);
	}
}

void Lazy(tree *p) {
	p->l->x = ((long long)p->l->x * p->y + p->x) % P;
	p->l->y = (long long)p->l->y * p->y % P;
	p->r->x = ((long long)p->r->x * p->y + p->x) % P;
	p->r->y = (long long)p->r->y * p->y % P;
	p->y = 1;
	p->x = 0;
}

void Mul(tree *p, int e) {
	if (p->s > e) return;
	if (p->e <= e) {
		p->x = (p->x << 1) % P;
		p->y = (p->y << 1) % P;
		return;
	}
	Lazy(p);
	Mul(p->l, e);
	Mul(p->r, e);
}

void Add(tree *p, int s, int e, int x) {
	if (p->s > e || p->e < s) return;
	if (s <= p->s && p->e <= e) {
		p->x = (p->x + x) % P;
		return;
	}
	Lazy(p);
	Add(p->l, s, e, x);
	Add(p->r, s, e, x);
}

int Get(tree *p, int x) {
	if (p->s == x && p->e == x) return p->x;
	Lazy(p);
	return p->r->s > x ? Get(p->l, x) : Get(p->r, x);
}

int main() {
	int i, j, k, n, m, r = 0;
	scanf("%d%d", &t[1], &n);
	t[0] = 1;
	for (i = 1; i <= n; i++) {
		scanf("%d%d", &t[i << 1], &t[i << 1 | 1]);
		a[i].first = t[i << 1 | 1];
		a[i].second = -t[i << 1];
	}
	sort(a + 1, a + n + 1);
	sort(t, t + n + n + 2);
	m = unique(t, t + n + n + 2) - t;
	Init(T, 0, m);
	for (i = 1; i <= n; i++) {
		a[i].first = upper_bound(t, t + m, a[i].first) - t;
		a[i].second = upper_bound(t, t + m, -a[i].second) - t;
		k = Get(T, a[i].second);
		if (a[i].first == m) r = (r + k) % P;
		Mul(T, a[i].second - 1);
		Add(T, a[i].second, a[i].first, k);
	}
	printf("%d", r);
}

Compilation message

rail.cpp: In function 'void Init(tree*, int, int)':
rail.cpp:24:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   Init(p->l, s, s + e >> 1);
                   ^
rail.cpp:26:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   Init(p->r, (s + e >> 1) + 1, e);
                 ^
rail.cpp: In function 'int main()':
rail.cpp:69:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j, k, n, m, r = 0;
         ^
rail.cpp:70:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &t[1], &n);
                          ^
rail.cpp:73:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &t[i << 1], &t[i << 1 | 1]);
                                            ^

Subtask #1
10.0 / 10.0

#	결과	메모리	Grader output
1	Correct	29244 KB	Output is correct
2	Correct	29244 KB	Output is correct
3	Correct	29244 KB	Output is correct
4	Correct	29244 KB	Output is correct
5	Correct	29244 KB	Output is correct
6	Correct	29244 KB	Output is correct
7	Correct	29244 KB	Output is correct
8	Correct	29244 KB	Output is correct
9	Correct	29244 KB	Output is correct
10	Correct	29244 KB	Output is correct
11	Correct	29244 KB	Output is correct
12	Correct	29244 KB	Output is correct
13	Correct	29244 KB	Output is correct
14	Correct	29244 KB	Output is correct
15	Correct	29244 KB	Output is correct
16	Correct	29244 KB	Output is correct
17	Correct	29244 KB	Output is correct
18	Correct	29244 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	메모리	Grader output
1	Correct	29244 KB	Output is correct
2	Correct	29244 KB	Output is correct
3	Correct	29244 KB	Output is correct
4	Correct	29244 KB	Output is correct
5	Correct	29244 KB	Output is correct
6	Correct	29244 KB	Output is correct
7	Correct	29244 KB	Output is correct
8	Correct	29244 KB	Output is correct
9	Correct	29244 KB	Output is correct
10	Correct	29244 KB	Output is correct
11	Correct	29244 KB	Output is correct
12	Correct	29244 KB	Output is correct
13	Correct	29244 KB	Output is correct
14	Correct	29244 KB	Output is correct
15	Correct	29244 KB	Output is correct
16	Correct	29244 KB	Output is correct
17	Correct	29244 KB	Output is correct
18	Correct	29244 KB	Output is correct
19	Correct	29244 KB	Output is correct
20	Correct	29244 KB	Output is correct
21	Correct	29244 KB	Output is correct
22	Correct	29244 KB	Output is correct
23	Correct	29244 KB	Output is correct
24	Correct	29244 KB	Output is correct
25	Correct	29244 KB	Output is correct
26	Correct	29244 KB	Output is correct
27	Correct	29244 KB	Output is correct
28	Correct	29244 KB	Output is correct
29	Correct	29244 KB	Output is correct
30	Correct	29244 KB	Output is correct
31	Correct	29244 KB	Output is correct
32	Correct	29244 KB	Output is correct
33	Correct	29244 KB	Output is correct
34	Correct	29244 KB	Output is correct
35	Correct	29244 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	29244 KB	Output is correct
2	Correct	0 ms	29244 KB	Output is correct
3	Correct	0 ms	29244 KB	Output is correct
4	Correct	6 ms	29244 KB	Output is correct
5	Correct	233 ms	29244 KB	Output is correct
6	Correct	329 ms	29244 KB	Output is correct
7	Correct	356 ms	29244 KB	Output is correct
8	Correct	0 ms	29244 KB	Output is correct
9	Correct	313 ms	29244 KB	Output is correct
10	Correct	326 ms	29244 KB	Output is correct
11	Correct	146 ms	29244 KB	Output is correct
12	Correct	339 ms	29244 KB	Output is correct
13	Correct	336 ms	29244 KB	Output is correct
14	Correct	73 ms	29244 KB	Output is correct
15	Correct	323 ms	29244 KB	Output is correct
16	Correct	79 ms	29244 KB	Output is correct
17	Correct	356 ms	29244 KB	Output is correct
18	Correct	343 ms	29244 KB	Output is correct
19	Correct	333 ms	29244 KB	Output is correct

Subtask #4
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	29244 KB	Output is correct
2	Correct	0 ms	29244 KB	Output is correct
3	Correct	0 ms	29244 KB	Output is correct
4	Correct	0 ms	29244 KB	Output is correct
5	Correct	0 ms	29244 KB	Output is correct
6	Correct	0 ms	29244 KB	Output is correct
7	Correct	0 ms	29244 KB	Output is correct
8	Correct	0 ms	29244 KB	Output is correct
9	Correct	0 ms	29244 KB	Output is correct
10	Correct	0 ms	29244 KB	Output is correct
11	Correct	0 ms	29244 KB	Output is correct
12	Correct	0 ms	29244 KB	Output is correct
13	Correct	0 ms	29244 KB	Output is correct
14	Correct	0 ms	29244 KB	Output is correct
15	Correct	0 ms	29244 KB	Output is correct
16	Correct	0 ms	29244 KB	Output is correct
17	Correct	0 ms	29244 KB	Output is correct
18	Correct	0 ms	29244 KB	Output is correct
19	Correct	0 ms	29244 KB	Output is correct
20	Correct	0 ms	29244 KB	Output is correct
21	Correct	0 ms	29244 KB	Output is correct
22	Correct	0 ms	29244 KB	Output is correct
23	Correct	0 ms	29244 KB	Output is correct
24	Correct	0 ms	29244 KB	Output is correct
25	Correct	0 ms	29244 KB	Output is correct
26	Correct	0 ms	29244 KB	Output is correct
27	Correct	0 ms	29244 KB	Output is correct
28	Correct	0 ms	29244 KB	Output is correct
29	Correct	0 ms	29244 KB	Output is correct
30	Correct	0 ms	29244 KB	Output is correct
31	Correct	0 ms	29244 KB	Output is correct
32	Correct	0 ms	29244 KB	Output is correct
33	Correct	0 ms	29244 KB	Output is correct
34	Correct	0 ms	29244 KB	Output is correct
35	Correct	0 ms	29244 KB	Output is correct
36	Correct	9 ms	29244 KB	Output is correct
37	Correct	6 ms	29244 KB	Output is correct
38	Correct	6 ms	29244 KB	Output is correct
39	Correct	0 ms	29244 KB	Output is correct
40	Correct	6 ms	29244 KB	Output is correct
41	Correct	9 ms	29244 KB	Output is correct
42	Correct	9 ms	29244 KB	Output is correct
43	Correct	0 ms	29244 KB	Output is correct
44	Correct	6 ms	29244 KB	Output is correct
45	Correct	0 ms	29244 KB	Output is correct
46	Correct	6 ms	29244 KB	Output is correct
47	Correct	6 ms	29244 KB	Output is correct
48	Correct	6 ms	29244 KB	Output is correct
49	Correct	3 ms	29244 KB	Output is correct
50	Correct	3 ms	29244 KB	Output is correct
51	Correct	3 ms	29244 KB	Output is correct
52	Correct	0 ms	29244 KB	Output is correct
53	Correct	6 ms	29244 KB	Output is correct
54	Correct	3 ms	29244 KB	Output is correct
55	Correct	9 ms	29244 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	29244 KB	Output is correct
2	Correct	0 ms	29244 KB	Output is correct
3	Correct	0 ms	29244 KB	Output is correct
4	Correct	0 ms	29244 KB	Output is correct
5	Correct	0 ms	29244 KB	Output is correct
6	Correct	0 ms	29244 KB	Output is correct
7	Correct	0 ms	29244 KB	Output is correct
8	Correct	0 ms	29244 KB	Output is correct
9	Correct	0 ms	29244 KB	Output is correct
10	Correct	0 ms	29244 KB	Output is correct
11	Correct	0 ms	29244 KB	Output is correct
12	Correct	0 ms	29244 KB	Output is correct
13	Correct	0 ms	29244 KB	Output is correct
14	Correct	0 ms	29244 KB	Output is correct
15	Correct	0 ms	29244 KB	Output is correct
16	Correct	0 ms	29244 KB	Output is correct
17	Correct	0 ms	29244 KB	Output is correct
18	Correct	0 ms	29244 KB	Output is correct
19	Correct	0 ms	29244 KB	Output is correct
20	Correct	0 ms	29244 KB	Output is correct
21	Correct	0 ms	29244 KB	Output is correct
22	Correct	0 ms	29244 KB	Output is correct
23	Correct	0 ms	29244 KB	Output is correct
24	Correct	0 ms	29244 KB	Output is correct
25	Correct	0 ms	29244 KB	Output is correct
26	Correct	0 ms	29244 KB	Output is correct
27	Correct	0 ms	29244 KB	Output is correct
28	Correct	0 ms	29244 KB	Output is correct
29	Correct	0 ms	29244 KB	Output is correct
30	Correct	0 ms	29244 KB	Output is correct
31	Correct	0 ms	29244 KB	Output is correct
32	Correct	0 ms	29244 KB	Output is correct
33	Correct	0 ms	29244 KB	Output is correct
34	Correct	0 ms	29244 KB	Output is correct
35	Correct	0 ms	29244 KB	Output is correct
36	Correct	0 ms	29244 KB	Output is correct
37	Correct	0 ms	29244 KB	Output is correct
38	Correct	0 ms	29244 KB	Output is correct
39	Correct	6 ms	29244 KB	Output is correct
40	Correct	233 ms	29244 KB	Output is correct
41	Correct	329 ms	29244 KB	Output is correct
42	Correct	356 ms	29244 KB	Output is correct
43	Correct	0 ms	29244 KB	Output is correct
44	Correct	313 ms	29244 KB	Output is correct
45	Correct	326 ms	29244 KB	Output is correct
46	Correct	146 ms	29244 KB	Output is correct
47	Correct	339 ms	29244 KB	Output is correct
48	Correct	336 ms	29244 KB	Output is correct
49	Correct	73 ms	29244 KB	Output is correct
50	Correct	323 ms	29244 KB	Output is correct
51	Correct	79 ms	29244 KB	Output is correct
52	Correct	356 ms	29244 KB	Output is correct
53	Correct	343 ms	29244 KB	Output is correct
54	Correct	333 ms	29244 KB	Output is correct
55	Correct	9 ms	29244 KB	Output is correct
56	Correct	6 ms	29244 KB	Output is correct
57	Correct	6 ms	29244 KB	Output is correct
58	Correct	0 ms	29244 KB	Output is correct
59	Correct	6 ms	29244 KB	Output is correct
60	Correct	9 ms	29244 KB	Output is correct
61	Correct	9 ms	29244 KB	Output is correct
62	Correct	0 ms	29244 KB	Output is correct
63	Correct	6 ms	29244 KB	Output is correct
64	Correct	0 ms	29244 KB	Output is correct
65	Correct	6 ms	29244 KB	Output is correct
66	Correct	6 ms	29244 KB	Output is correct
67	Correct	6 ms	29244 KB	Output is correct
68	Correct	3 ms	29244 KB	Output is correct
69	Correct	3 ms	29244 KB	Output is correct
70	Correct	3 ms	29244 KB	Output is correct
71	Correct	0 ms	29244 KB	Output is correct
72	Correct	6 ms	29244 KB	Output is correct
73	Correct	3 ms	29244 KB	Output is correct
74	Correct	9 ms	29244 KB	Output is correct
75	Correct	573 ms	29244 KB	Output is correct
76	Correct	363 ms	29244 KB	Output is correct
77	Correct	256 ms	29244 KB	Output is correct
78	Correct	76 ms	29244 KB	Output is correct
79	Correct	383 ms	29244 KB	Output is correct
80	Correct	539 ms	29244 KB	Output is correct
81	Correct	6 ms	29244 KB	Output is correct
82	Correct	509 ms	29244 KB	Output is correct
83	Correct	76 ms	29244 KB	Output is correct
84	Correct	449 ms	29244 KB	Output is correct
85	Correct	443 ms	29244 KB	Output is correct
86	Correct	439 ms	29244 KB	Output is correct
87	Correct	133 ms	29244 KB	Output is correct
88	Correct	139 ms	29244 KB	Output is correct
89	Correct	546 ms	29244 KB	Output is correct
90	Correct	543 ms	29244 KB	Output is correct
91	Correct	543 ms	29244 KB	Output is correct
92	Correct	479 ms	29244 KB	Output is correct
93	Correct	433 ms	29244 KB	Output is correct
94	Correct	579 ms	29244 KB	Output is correct
95	Correct	589 ms	29244 KB	Output is correct

답안 #20396

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 30.0 / 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
30.0 / 30.0