답안 #99945 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
99945	2019-03-08T21:14:44 Z	TadijaSebez	Boat (APIO16_boat)	C++11	100 / 100	1339 ms	1532 KB

boat

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
const int N=505;
const int M=2*N;
const int K=1000050;
const int mod=1e9+7;
int mul(int x, int y){ return (ll)x*y%mod;}
int add(int x, int y){ x+=y;return x>=mod?x-mod:x;}
int sub(int x, int y){ x-=y;return x<0?x+mod:x;}
int pow(int x, int k){ int ans=1;for(;k;k>>=1,x=mul(x,x)) if(k&1) ans=mul(ans,x);return ans;}
int inv(int x){ return pow(x,mod-2);}
int F[K],I[K];
int binom(int n, int k){ return n<k?0:mul(F[n],mul(I[k],I[n-k]));}
int dp[N],tmp[N][N],l[N],r[N];
void calc()
{
	F[0]=1;for(int i=1;i<K;i++) F[i]=mul(F[i-1],i);
	I[K-1]=inv(F[K-1]);for(int i=K-2;~i;i--) I[i]=mul(I[i+1],i+1);
}
int bc[N];
int main()
{
	//calc();
	int n;
	scanf("%i",&n);
	vector<int> all;
	for(int i=1;i<=n;i++)
	{
		scanf("%i %i",&l[i],&r[i]);
		all.pb(l[i]);
		all.pb(r[i]+1);
	}
	sort(all.begin(),all.end());
	all.resize(unique(all.begin(),all.end())-all.begin());
	dp[0]=1;
	for(int t=1;t<all.size();t++)
	{
		int L=all[t]-all[t-1];
		bc[0]=1;
		for(int i=1;i<=n;i++) bc[i]=mul(bc[i-1],mul(L-i+1,inv(i)));
		for(int i=1;i<=n;i++) dp[i]=add(dp[i],dp[i-1]);
		for(int j=1;j<=n;j++)
		{
			for(int i=j;i<=n;i++)
			{
				if(all[t-1]<=r[i] && all[t-1]>=l[i]) tmp[i][j]=j==1?dp[i-1]:tmp[i-1][j-1];
				else tmp[i][j]=0;
			}
			if(j==1) for(int i=n;i>=1;i--) dp[i]=sub(dp[i],dp[i-1]);
			for(int i=j;i<=n;i++) dp[i]=add(dp[i],mul(tmp[i][j],bc[j]));
			for(int i=j;i<=n;i++) tmp[i][j]=add(tmp[i][j],tmp[i-1][j]);
		}
	}
	int ans=0;
	for(int i=1;i<=n;i++) ans=add(ans,dp[i]);
	printf("%i\n",ans);
	return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:38:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int t=1;t<all.size();t++)
              ~^~~~~~~~~~~
boat.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&n);
  ~~~~~^~~~~~~~~
boat.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i %i",&l[i],&r[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1198 ms	1408 KB	Output is correct
2	Correct	1165 ms	1280 KB	Output is correct
3	Correct	1174 ms	1400 KB	Output is correct
4	Correct	1202 ms	1280 KB	Output is correct
5	Correct	1267 ms	1408 KB	Output is correct
6	Correct	1221 ms	1408 KB	Output is correct
7	Correct	1223 ms	1400 KB	Output is correct
8	Correct	1339 ms	1408 KB	Output is correct
9	Correct	1237 ms	1280 KB	Output is correct
10	Correct	1282 ms	1528 KB	Output is correct
11	Correct	1160 ms	1368 KB	Output is correct
12	Correct	1242 ms	1400 KB	Output is correct
13	Correct	1212 ms	1400 KB	Output is correct
14	Correct	1203 ms	1364 KB	Output is correct
15	Correct	1153 ms	1400 KB	Output is correct
16	Correct	205 ms	1280 KB	Output is correct
17	Correct	239 ms	1280 KB	Output is correct
18	Correct	208 ms	1280 KB	Output is correct
19	Correct	223 ms	1408 KB	Output is correct
20	Correct	238 ms	1408 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1198 ms	1408 KB	Output is correct
2	Correct	1165 ms	1280 KB	Output is correct
3	Correct	1174 ms	1400 KB	Output is correct
4	Correct	1202 ms	1280 KB	Output is correct
5	Correct	1267 ms	1408 KB	Output is correct
6	Correct	1221 ms	1408 KB	Output is correct
7	Correct	1223 ms	1400 KB	Output is correct
8	Correct	1339 ms	1408 KB	Output is correct
9	Correct	1237 ms	1280 KB	Output is correct
10	Correct	1282 ms	1528 KB	Output is correct
11	Correct	1160 ms	1368 KB	Output is correct
12	Correct	1242 ms	1400 KB	Output is correct
13	Correct	1212 ms	1400 KB	Output is correct
14	Correct	1203 ms	1364 KB	Output is correct
15	Correct	1153 ms	1400 KB	Output is correct
16	Correct	205 ms	1280 KB	Output is correct
17	Correct	239 ms	1280 KB	Output is correct
18	Correct	208 ms	1280 KB	Output is correct
19	Correct	223 ms	1408 KB	Output is correct
20	Correct	238 ms	1408 KB	Output is correct
21	Correct	1012 ms	1280 KB	Output is correct
22	Correct	1106 ms	1400 KB	Output is correct
23	Correct	1229 ms	1400 KB	Output is correct
24	Correct	1093 ms	1400 KB	Output is correct
25	Correct	1028 ms	1400 KB	Output is correct
26	Correct	1029 ms	1280 KB	Output is correct
27	Correct	1121 ms	1532 KB	Output is correct
28	Correct	1033 ms	1400 KB	Output is correct
29	Correct	1061 ms	1268 KB	Output is correct
30	Correct	1144 ms	1280 KB	Output is correct
31	Correct	1115 ms	1384 KB	Output is correct
32	Correct	1131 ms	1420 KB	Output is correct
33	Correct	1163 ms	1528 KB	Output is correct
34	Correct	1117 ms	1280 KB	Output is correct
35	Correct	1202 ms	1388 KB	Output is correct
36	Correct	1147 ms	1400 KB	Output is correct
37	Correct	1299 ms	1400 KB	Output is correct
38	Correct	1208 ms	1384 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	512 KB	Output is correct
2	Correct	13 ms	512 KB	Output is correct
3	Correct	13 ms	512 KB	Output is correct
4	Correct	14 ms	512 KB	Output is correct
5	Correct	14 ms	512 KB	Output is correct
6	Correct	14 ms	512 KB	Output is correct
7	Correct	13 ms	512 KB	Output is correct
8	Correct	14 ms	512 KB	Output is correct
9	Correct	14 ms	512 KB	Output is correct
10	Correct	15 ms	512 KB	Output is correct
11	Correct	13 ms	512 KB	Output is correct
12	Correct	13 ms	512 KB	Output is correct
13	Correct	13 ms	512 KB	Output is correct
14	Correct	13 ms	512 KB	Output is correct
15	Correct	14 ms	512 KB	Output is correct
16	Correct	9 ms	512 KB	Output is correct
17	Correct	9 ms	512 KB	Output is correct
18	Correct	8 ms	512 KB	Output is correct
19	Correct	9 ms	512 KB	Output is correct
20	Correct	11 ms	512 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1198 ms	1408 KB	Output is correct
2	Correct	1165 ms	1280 KB	Output is correct
3	Correct	1174 ms	1400 KB	Output is correct
4	Correct	1202 ms	1280 KB	Output is correct
5	Correct	1267 ms	1408 KB	Output is correct
6	Correct	1221 ms	1408 KB	Output is correct
7	Correct	1223 ms	1400 KB	Output is correct
8	Correct	1339 ms	1408 KB	Output is correct
9	Correct	1237 ms	1280 KB	Output is correct
10	Correct	1282 ms	1528 KB	Output is correct
11	Correct	1160 ms	1368 KB	Output is correct
12	Correct	1242 ms	1400 KB	Output is correct
13	Correct	1212 ms	1400 KB	Output is correct
14	Correct	1203 ms	1364 KB	Output is correct
15	Correct	1153 ms	1400 KB	Output is correct
16	Correct	205 ms	1280 KB	Output is correct
17	Correct	239 ms	1280 KB	Output is correct
18	Correct	208 ms	1280 KB	Output is correct
19	Correct	223 ms	1408 KB	Output is correct
20	Correct	238 ms	1408 KB	Output is correct
21	Correct	1012 ms	1280 KB	Output is correct
22	Correct	1106 ms	1400 KB	Output is correct
23	Correct	1229 ms	1400 KB	Output is correct
24	Correct	1093 ms	1400 KB	Output is correct
25	Correct	1028 ms	1400 KB	Output is correct
26	Correct	1029 ms	1280 KB	Output is correct
27	Correct	1121 ms	1532 KB	Output is correct
28	Correct	1033 ms	1400 KB	Output is correct
29	Correct	1061 ms	1268 KB	Output is correct
30	Correct	1144 ms	1280 KB	Output is correct
31	Correct	1115 ms	1384 KB	Output is correct
32	Correct	1131 ms	1420 KB	Output is correct
33	Correct	1163 ms	1528 KB	Output is correct
34	Correct	1117 ms	1280 KB	Output is correct
35	Correct	1202 ms	1388 KB	Output is correct
36	Correct	1147 ms	1400 KB	Output is correct
37	Correct	1299 ms	1400 KB	Output is correct
38	Correct	1208 ms	1384 KB	Output is correct
39	Correct	13 ms	512 KB	Output is correct
40	Correct	13 ms	512 KB	Output is correct
41	Correct	13 ms	512 KB	Output is correct
42	Correct	14 ms	512 KB	Output is correct
43	Correct	14 ms	512 KB	Output is correct
44	Correct	14 ms	512 KB	Output is correct
45	Correct	13 ms	512 KB	Output is correct
46	Correct	14 ms	512 KB	Output is correct
47	Correct	14 ms	512 KB	Output is correct
48	Correct	15 ms	512 KB	Output is correct
49	Correct	13 ms	512 KB	Output is correct
50	Correct	13 ms	512 KB	Output is correct
51	Correct	13 ms	512 KB	Output is correct
52	Correct	13 ms	512 KB	Output is correct
53	Correct	14 ms	512 KB	Output is correct
54	Correct	9 ms	512 KB	Output is correct
55	Correct	9 ms	512 KB	Output is correct
56	Correct	8 ms	512 KB	Output is correct
57	Correct	9 ms	512 KB	Output is correct
58	Correct	11 ms	512 KB	Output is correct
59	Correct	1180 ms	1408 KB	Output is correct
60	Correct	1165 ms	1400 KB	Output is correct
61	Correct	1214 ms	1400 KB	Output is correct
62	Correct	1151 ms	1400 KB	Output is correct
63	Correct	1224 ms	1500 KB	Output is correct
64	Correct	1176 ms	1280 KB	Output is correct
65	Correct	1179 ms	1408 KB	Output is correct
66	Correct	1182 ms	1408 KB	Output is correct
67	Correct	1111 ms	1400 KB	Output is correct
68	Correct	1158 ms	1400 KB	Output is correct
69	Correct	1265 ms	1528 KB	Output is correct
70	Correct	1135 ms	1400 KB	Output is correct
71	Correct	1141 ms	1408 KB	Output is correct
72	Correct	1157 ms	1420 KB	Output is correct
73	Correct	1336 ms	1484 KB	Output is correct
74	Correct	221 ms	1280 KB	Output is correct
75	Correct	218 ms	1400 KB	Output is correct
76	Correct	217 ms	1528 KB	Output is correct
77	Correct	255 ms	1408 KB	Output is correct
78	Correct	221 ms	1280 KB	Output is correct

답안 #99945

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