답안 #42628 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
42628	2018-03-01T14:33:20 Z	fefe	Boat (APIO16_boat)	C++14	100 / 100	1070 ms	1440 KB

boat

#include<bits/stdc++.h>
#define MAX_N 505
#define mod 1000000007LL
#define pb push_back
typedef long long LL;
using namespace std;
struct node{
	LL s,e;
}arr[MAX_N];
LL n,ans,inv[10*MAX_N];
LL t[MAX_N],sum[MAX_N],ss[MAX_N];
vector<LL> X,lst;
LL Pow(LL x,LL y){
	if(y==0)	return 1;
	if(y==1)	return x;
	LL z=Pow(x,y/2);
	z*=z;z%=mod;
	if(y%2)	z*=x;
	z%=mod;
	return z;
}
int main(){
	LL i,j,k,s,e,x,y,S,E,cnt,p;
	scanf("%lld",&n);
	for(i=1;i<=n;i++){
		scanf("%lld %lld",&arr[i].s,&arr[i].e);
		arr[i].e++;
		X.pb(arr[i].s);X.pb(arr[i].e);
	}
	for(i=1;i<=2000;i++)	inv[i]=Pow(i,mod-2);
	sort(X.begin(),X.end());X.erase(unique(X.begin(),X.end()),X.end());
	LL sz=X.size();
	ss[0]=1;
	for(i=0;i<=n;i++)	sum[i]=1;
	for(i=1;i<sz;i++){
		s=X[i-1];
		e=X[i];
		lst.resize(0);
		sum[0]=1;
		for(j=1;j<=n;j++){
			if(arr[j].e>=e && arr[j].s<=s)	lst.pb(j);
		}
		p=e-s;
		y=lst.size();
		for(j=0;j<y;j++)	t[j]=(p*sum[lst[j]-1]+(j?t[j-1]:0))%mod;
		for(k=0;k<y;k++)	ss[lst[k]]=(ss[lst[k]]+t[k]-(k?t[k-1]:0)+mod)%mod;
		for(j=2;j<=y && j<=p;j++){
			for(k=y-1;k>=j-1;k--)	t[k]=((t[k-1]*(p-j+1))%mod*inv[j])%mod;
			for(k=0;k<j-1;k++)	t[k]=0;
			for(k=0;k<y;k++)	t[k]=(t[k]+(j?t[k-1]:0))%mod;
			for(k=0;k<y;k++)	ss[lst[k]]=(ss[lst[k]]+t[k]-(k?t[k-1]:0)+mod)%mod;
		}
		x=0;
		sum[0]=1;
		for(j=1;j<=n;j++){
			sum[j]=(sum[j-1]+ss[j])%mod;
		}
	}
	printf("%lld\n",(sum[n]-1+mod)%mod);
	return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:23:15: warning: variable 'x' set but not used [-Wunused-but-set-variable]
  LL i,j,k,s,e,x,y,S,E,cnt,p;
               ^
boat.cpp:23:19: warning: unused variable 'S' [-Wunused-variable]
  LL i,j,k,s,e,x,y,S,E,cnt,p;
                   ^
boat.cpp:23:21: warning: unused variable 'E' [-Wunused-variable]
  LL i,j,k,s,e,x,y,S,E,cnt,p;
                     ^
boat.cpp:23:23: warning: unused variable 'cnt' [-Wunused-variable]
  LL i,j,k,s,e,x,y,S,E,cnt,p;
                       ^
boat.cpp:24:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
                  ^
boat.cpp:26:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld",&arr[i].s,&arr[i].e);
                                         ^

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	376 KB	Output is correct
2	Correct	8 ms	480 KB	Output is correct
3	Correct	7 ms	480 KB	Output is correct
4	Correct	8 ms	492 KB	Output is correct
5	Correct	8 ms	624 KB	Output is correct
6	Correct	6 ms	624 KB	Output is correct
7	Correct	7 ms	624 KB	Output is correct
8	Correct	6 ms	636 KB	Output is correct
9	Correct	7 ms	636 KB	Output is correct
10	Correct	7 ms	636 KB	Output is correct
11	Correct	6 ms	636 KB	Output is correct
12	Correct	7 ms	712 KB	Output is correct
13	Correct	6 ms	712 KB	Output is correct
14	Correct	7 ms	712 KB	Output is correct
15	Correct	7 ms	712 KB	Output is correct
16	Correct	4 ms	712 KB	Output is correct
17	Correct	3 ms	712 KB	Output is correct
18	Correct	3 ms	712 KB	Output is correct
19	Correct	3 ms	712 KB	Output is correct
20	Correct	3 ms	712 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	376 KB	Output is correct
2	Correct	8 ms	480 KB	Output is correct
3	Correct	7 ms	480 KB	Output is correct
4	Correct	8 ms	492 KB	Output is correct
5	Correct	8 ms	624 KB	Output is correct
6	Correct	6 ms	624 KB	Output is correct
7	Correct	7 ms	624 KB	Output is correct
8	Correct	6 ms	636 KB	Output is correct
9	Correct	7 ms	636 KB	Output is correct
10	Correct	7 ms	636 KB	Output is correct
11	Correct	6 ms	636 KB	Output is correct
12	Correct	7 ms	712 KB	Output is correct
13	Correct	6 ms	712 KB	Output is correct
14	Correct	7 ms	712 KB	Output is correct
15	Correct	7 ms	712 KB	Output is correct
16	Correct	4 ms	712 KB	Output is correct
17	Correct	3 ms	712 KB	Output is correct
18	Correct	3 ms	712 KB	Output is correct
19	Correct	3 ms	712 KB	Output is correct
20	Correct	3 ms	712 KB	Output is correct
21	Correct	21 ms	712 KB	Output is correct
22	Correct	18 ms	748 KB	Output is correct
23	Correct	22 ms	748 KB	Output is correct
24	Correct	19 ms	748 KB	Output is correct
25	Correct	19 ms	748 KB	Output is correct
26	Correct	18 ms	764 KB	Output is correct
27	Correct	19 ms	932 KB	Output is correct
28	Correct	18 ms	932 KB	Output is correct
29	Correct	19 ms	932 KB	Output is correct
30	Correct	7 ms	932 KB	Output is correct
31	Correct	7 ms	932 KB	Output is correct
32	Correct	7 ms	932 KB	Output is correct
33	Correct	6 ms	932 KB	Output is correct
34	Correct	7 ms	932 KB	Output is correct
35	Correct	8 ms	932 KB	Output is correct
36	Correct	8 ms	932 KB	Output is correct
37	Correct	8 ms	1052 KB	Output is correct
38	Correct	8 ms	1052 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	1052 KB	Output is correct
2	Correct	5 ms	1052 KB	Output is correct
3	Correct	6 ms	1052 KB	Output is correct
4	Correct	6 ms	1052 KB	Output is correct
5	Correct	6 ms	1052 KB	Output is correct
6	Correct	10 ms	1052 KB	Output is correct
7	Correct	11 ms	1052 KB	Output is correct
8	Correct	11 ms	1052 KB	Output is correct
9	Correct	11 ms	1100 KB	Output is correct
10	Correct	11 ms	1100 KB	Output is correct
11	Correct	6 ms	1100 KB	Output is correct
12	Correct	5 ms	1100 KB	Output is correct
13	Correct	6 ms	1128 KB	Output is correct
14	Correct	6 ms	1128 KB	Output is correct
15	Correct	6 ms	1128 KB	Output is correct
16	Correct	4 ms	1128 KB	Output is correct
17	Correct	4 ms	1128 KB	Output is correct
18	Correct	4 ms	1128 KB	Output is correct
19	Correct	3 ms	1128 KB	Output is correct
20	Correct	4 ms	1128 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	376 KB	Output is correct
2	Correct	8 ms	480 KB	Output is correct
3	Correct	7 ms	480 KB	Output is correct
4	Correct	8 ms	492 KB	Output is correct
5	Correct	8 ms	624 KB	Output is correct
6	Correct	6 ms	624 KB	Output is correct
7	Correct	7 ms	624 KB	Output is correct
8	Correct	6 ms	636 KB	Output is correct
9	Correct	7 ms	636 KB	Output is correct
10	Correct	7 ms	636 KB	Output is correct
11	Correct	6 ms	636 KB	Output is correct
12	Correct	7 ms	712 KB	Output is correct
13	Correct	6 ms	712 KB	Output is correct
14	Correct	7 ms	712 KB	Output is correct
15	Correct	7 ms	712 KB	Output is correct
16	Correct	4 ms	712 KB	Output is correct
17	Correct	3 ms	712 KB	Output is correct
18	Correct	3 ms	712 KB	Output is correct
19	Correct	3 ms	712 KB	Output is correct
20	Correct	3 ms	712 KB	Output is correct
21	Correct	21 ms	712 KB	Output is correct
22	Correct	18 ms	748 KB	Output is correct
23	Correct	22 ms	748 KB	Output is correct
24	Correct	19 ms	748 KB	Output is correct
25	Correct	19 ms	748 KB	Output is correct
26	Correct	18 ms	764 KB	Output is correct
27	Correct	19 ms	932 KB	Output is correct
28	Correct	18 ms	932 KB	Output is correct
29	Correct	19 ms	932 KB	Output is correct
30	Correct	7 ms	932 KB	Output is correct
31	Correct	7 ms	932 KB	Output is correct
32	Correct	7 ms	932 KB	Output is correct
33	Correct	6 ms	932 KB	Output is correct
34	Correct	7 ms	932 KB	Output is correct
35	Correct	8 ms	932 KB	Output is correct
36	Correct	8 ms	932 KB	Output is correct
37	Correct	8 ms	1052 KB	Output is correct
38	Correct	8 ms	1052 KB	Output is correct
39	Correct	6 ms	1052 KB	Output is correct
40	Correct	5 ms	1052 KB	Output is correct
41	Correct	6 ms	1052 KB	Output is correct
42	Correct	6 ms	1052 KB	Output is correct
43	Correct	6 ms	1052 KB	Output is correct
44	Correct	10 ms	1052 KB	Output is correct
45	Correct	11 ms	1052 KB	Output is correct
46	Correct	11 ms	1052 KB	Output is correct
47	Correct	11 ms	1100 KB	Output is correct
48	Correct	11 ms	1100 KB	Output is correct
49	Correct	6 ms	1100 KB	Output is correct
50	Correct	5 ms	1100 KB	Output is correct
51	Correct	6 ms	1128 KB	Output is correct
52	Correct	6 ms	1128 KB	Output is correct
53	Correct	6 ms	1128 KB	Output is correct
54	Correct	4 ms	1128 KB	Output is correct
55	Correct	4 ms	1128 KB	Output is correct
56	Correct	4 ms	1128 KB	Output is correct
57	Correct	3 ms	1128 KB	Output is correct
58	Correct	4 ms	1128 KB	Output is correct
59	Correct	460 ms	1128 KB	Output is correct
60	Correct	404 ms	1172 KB	Output is correct
61	Correct	383 ms	1184 KB	Output is correct
62	Correct	463 ms	1196 KB	Output is correct
63	Correct	425 ms	1208 KB	Output is correct
64	Correct	1053 ms	1220 KB	Output is correct
65	Correct	1070 ms	1220 KB	Output is correct
66	Correct	1067 ms	1244 KB	Output is correct
67	Correct	1065 ms	1256 KB	Output is correct
68	Correct	1045 ms	1268 KB	Output is correct
69	Correct	399 ms	1280 KB	Output is correct
70	Correct	397 ms	1280 KB	Output is correct
71	Correct	392 ms	1304 KB	Output is correct
72	Correct	433 ms	1440 KB	Output is correct
73	Correct	439 ms	1440 KB	Output is correct
74	Correct	49 ms	1440 KB	Output is correct
75	Correct	44 ms	1440 KB	Output is correct
76	Correct	46 ms	1440 KB	Output is correct
77	Correct	47 ms	1440 KB	Output is correct
78	Correct	48 ms	1440 KB	Output is correct

답안 #42628

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 22.0 / 22.0

Subtask #3 27.0 / 27.0

Subtask #4 42.0 / 42.0

Subtask #1
9.0 / 9.0

Subtask #2
22.0 / 22.0

Subtask #3
27.0 / 27.0

Subtask #4
42.0 / 42.0