답안 #20345 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
20345	2017-02-07T06:49:54 Z		초음속철도 (OJUZ11_rail)	C++	45 / 100	617 ms	197260 KB

rail

#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
typedef long long ll;
#define MOD (ll)(1e9+7)

int N,M;
const int MAX_M = 5010;

ll dp[MAX_M][MAX_M];

struct pt{
	int s,e;
	bool operator<(const pt& r)const{
		return s!=r.s?s<r.s:e<r.e;
	}
}a[MAX_M];

ll f(int x,int lim){
	if(x>M)return a[lim].e==N;
	ll& ret=dp[x][lim];
	if(~ret)return ret;
	if(a[lim].e<a[x].s)return 0;

	return ret=(f(x+1,lim)+f(x+1,a[lim].e<a[x].e?x:lim))%MOD;
}

int main(){

	memset(dp,-1,sizeof(dp));

	scanf("%d%d",&N,&M);

	a[0]=pt{1,1};
	for(int i=1,x,y;i<=M;i++){
		scanf("%d%d",&x,&y);
		a[i]=pt{x,y};
	}

	sort(a+1,a+M+1);


	printf("%lld\n",f(1,0));

	return 0;
}

Compilation message

rail.cpp: In function 'int main()':
rail.cpp:35:9: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11
  a[0]=pt{1,1};
         ^
rail.cpp:38:10: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11
   a[i]=pt{x,y};
          ^
rail.cpp:33:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&N,&M);
                     ^
rail.cpp:37:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x,&y);
                      ^

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	124 ms	196756 KB	Output is correct
2	Correct	129 ms	196756 KB	Output is correct
3	Correct	135 ms	196756 KB	Output is correct
4	Correct	129 ms	196756 KB	Output is correct
5	Correct	128 ms	196756 KB	Output is correct
6	Correct	124 ms	196756 KB	Output is correct
7	Correct	135 ms	196756 KB	Output is correct
8	Correct	129 ms	196756 KB	Output is correct
9	Correct	132 ms	196756 KB	Output is correct
10	Correct	126 ms	196756 KB	Output is correct
11	Correct	124 ms	196756 KB	Output is correct
12	Correct	129 ms	196756 KB	Output is correct
13	Correct	129 ms	196756 KB	Output is correct
14	Correct	126 ms	196756 KB	Output is correct
15	Correct	126 ms	196756 KB	Output is correct
16	Correct	125 ms	196756 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	124 ms	196756 KB	Output is correct
2	Correct	129 ms	196756 KB	Output is correct
3	Correct	135 ms	196756 KB	Output is correct
4	Correct	129 ms	196756 KB	Output is correct
5	Correct	128 ms	196756 KB	Output is correct
6	Correct	124 ms	196756 KB	Output is correct
7	Correct	135 ms	196756 KB	Output is correct
8	Correct	129 ms	196756 KB	Output is correct
9	Correct	132 ms	196756 KB	Output is correct
10	Correct	126 ms	196756 KB	Output is correct
11	Correct	124 ms	196756 KB	Output is correct
12	Correct	129 ms	196756 KB	Output is correct
13	Correct	129 ms	196756 KB	Output is correct
14	Correct	126 ms	196756 KB	Output is correct
15	Correct	126 ms	196756 KB	Output is correct
16	Correct	125 ms	196756 KB	Output is correct
17	Correct	125 ms	196816 KB	Output is correct
18	Correct	127 ms	196816 KB	Output is correct
19	Correct	127 ms	196816 KB	Output is correct
20	Correct	126 ms	196816 KB	Output is correct
21	Correct	127 ms	196816 KB	Output is correct
22	Correct	133 ms	196816 KB	Output is correct
23	Correct	129 ms	196816 KB	Output is correct
24	Correct	132 ms	196816 KB	Output is correct
25	Correct	144 ms	196816 KB	Output is correct
26	Correct	143 ms	196816 KB	Output is correct
27	Correct	132 ms	196816 KB	Output is correct
28	Correct	126 ms	196816 KB	Output is correct
29	Correct	127 ms	196816 KB	Output is correct
30	Correct	128 ms	196816 KB	Output is correct
31	Correct	130 ms	196816 KB	Output is correct
32	Correct	127 ms	196816 KB	Output is correct

Subtask #3
0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	125 ms	196816 KB	Output is correct
2	Correct	127 ms	196816 KB	Output is correct
3	Correct	124 ms	196852 KB	Output is correct
4	Correct	462 ms	197260 KB	Output is correct
5	Incorrect	200 ms	197260 KB	-

Subtask #4
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	124 ms	196756 KB	Output is correct
2	Correct	129 ms	196756 KB	Output is correct
3	Correct	135 ms	196756 KB	Output is correct
4	Correct	129 ms	196756 KB	Output is correct
5	Correct	128 ms	196756 KB	Output is correct
6	Correct	124 ms	196756 KB	Output is correct
7	Correct	135 ms	196756 KB	Output is correct
8	Correct	129 ms	196756 KB	Output is correct
9	Correct	132 ms	196756 KB	Output is correct
10	Correct	126 ms	196756 KB	Output is correct
11	Correct	124 ms	196756 KB	Output is correct
12	Correct	129 ms	196756 KB	Output is correct
13	Correct	129 ms	196756 KB	Output is correct
14	Correct	126 ms	196756 KB	Output is correct
15	Correct	126 ms	196756 KB	Output is correct
16	Correct	125 ms	196756 KB	Output is correct
17	Correct	125 ms	196816 KB	Output is correct
18	Correct	127 ms	196816 KB	Output is correct
19	Correct	127 ms	196816 KB	Output is correct
20	Correct	126 ms	196816 KB	Output is correct
21	Correct	127 ms	196816 KB	Output is correct
22	Correct	133 ms	196816 KB	Output is correct
23	Correct	129 ms	196816 KB	Output is correct
24	Correct	132 ms	196816 KB	Output is correct
25	Correct	144 ms	196816 KB	Output is correct
26	Correct	143 ms	196816 KB	Output is correct
27	Correct	132 ms	196816 KB	Output is correct
28	Correct	126 ms	196816 KB	Output is correct
29	Correct	127 ms	196816 KB	Output is correct
30	Correct	128 ms	196816 KB	Output is correct
31	Correct	130 ms	196816 KB	Output is correct
32	Correct	127 ms	196816 KB	Output is correct
33	Correct	393 ms	197260 KB	Output is correct
34	Correct	419 ms	197260 KB	Output is correct
35	Correct	435 ms	197260 KB	Output is correct
36	Correct	617 ms	197260 KB	Output is correct
37	Correct	127 ms	197260 KB	Output is correct
38	Correct	298 ms	197260 KB	Output is correct
39	Correct	125 ms	197260 KB	Output is correct
40	Correct	589 ms	197260 KB	Output is correct
41	Correct	572 ms	197260 KB	Output is correct
42	Correct	555 ms	197260 KB	Output is correct
43	Correct	470 ms	197260 KB	Output is correct
44	Correct	529 ms	197260 KB	Output is correct
45	Correct	595 ms	197260 KB	Output is correct
46	Correct	567 ms	197260 KB	Output is correct
47	Correct	570 ms	197260 KB	Output is correct
48	Correct	134 ms	197260 KB	Output is correct
49	Correct	129 ms	197260 KB	Output is correct
50	Correct	266 ms	197260 KB	Output is correct
51	Correct	127 ms	197260 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	124 ms	196756 KB	Output is correct
2	Correct	129 ms	196756 KB	Output is correct
3	Correct	135 ms	196756 KB	Output is correct
4	Correct	129 ms	196756 KB	Output is correct
5	Correct	128 ms	196756 KB	Output is correct
6	Correct	124 ms	196756 KB	Output is correct
7	Correct	135 ms	196756 KB	Output is correct
8	Correct	129 ms	196756 KB	Output is correct
9	Correct	132 ms	196756 KB	Output is correct
10	Correct	126 ms	196756 KB	Output is correct
11	Correct	124 ms	196756 KB	Output is correct
12	Correct	129 ms	196756 KB	Output is correct
13	Correct	129 ms	196756 KB	Output is correct
14	Correct	126 ms	196756 KB	Output is correct
15	Correct	126 ms	196756 KB	Output is correct
16	Correct	125 ms	196756 KB	Output is correct
17	Correct	125 ms	196816 KB	Output is correct
18	Correct	127 ms	196816 KB	Output is correct
19	Correct	127 ms	196816 KB	Output is correct
20	Correct	126 ms	196816 KB	Output is correct
21	Correct	127 ms	196816 KB	Output is correct
22	Correct	133 ms	196816 KB	Output is correct
23	Correct	129 ms	196816 KB	Output is correct
24	Correct	132 ms	196816 KB	Output is correct
25	Correct	144 ms	196816 KB	Output is correct
26	Correct	143 ms	196816 KB	Output is correct
27	Correct	132 ms	196816 KB	Output is correct
28	Correct	126 ms	196816 KB	Output is correct
29	Correct	127 ms	196816 KB	Output is correct
30	Correct	128 ms	196816 KB	Output is correct
31	Correct	130 ms	196816 KB	Output is correct
32	Correct	127 ms	196816 KB	Output is correct
33	Correct	125 ms	196816 KB	Output is correct
34	Correct	127 ms	196816 KB	Output is correct
35	Correct	124 ms	196852 KB	Output is correct
36	Correct	462 ms	197260 KB	Output is correct
37	Incorrect	200 ms	197260 KB	-

답안 #20345

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 8.0 / 8.0

Subtask #3 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
0 / 25.0

Subtask #4
27.0 / 27.0

Subtask #5
0 / 30.0