oj.uz

Submission #48232

# Submission time Handle Problem Language Result Execution time Memory
48232 2018-05-11T01:45:06 Z hihi Asceticism (JOI18_asceticism) C++11
100 / 100
 27 ms 3252 KB 
#include<stdio.h>
#include<math.h>
#include<algorithm>
#include<queue>
#include<deque>
#include<string>
#include<string.h>
#include<vector>
#include<set>
#include<map>
#include<stdlib.h>
#include<cassert>
using namespace std;
const long long mod=1000000007;
const long long inf=mod*mod;
const long long d2=500000004;
const double EPS=1e-6;
const double PI=acos(-1.0);
int ABS(int a){return max(a,-a);}
long long ABS(long long a){return max(a,-a);}
long long finv[110000];
long long inv[110000];
long long fact[110000];
long long C(int a,int b){
	if(a<b)return 0;
	return fact[a]*finv[b]%mod*finv[a-b]%mod;
}
long long pw(long long a,long long b){
	long long ret=1;
	while(b){
		if(b%2)ret=ret*a%mod;
		a=a*a%mod;
		b/=2;
	}
	return ret;
}
long long f(int a,int b){
	long long ret=0;
	for(int i=0;i<=b;i++){
		long long t=pw(b-i,a)*finv[a]%mod*C(a,i)%mod;
		if(i%2)ret=(ret+mod-t)%mod;
		else ret=(ret+t)%mod;
	}
	return ret;
}
long long calc(int a,int b){
	long long ret=f(a,b+1);
	ret=(ret+mod-f(a,b))%mod;
	return ret;
}
int main(){
	fact[0]=1;
	for(int i=1;i<110000;i++)fact[i]=fact[i-1]*i%mod;
	inv[1]=1;
	for(int i=2;i<110000;i++){
		inv[i]=(mod-(mod/i)*inv[mod%i]%mod)%mod;
	}
	finv[0]=1;
	for(int i=1;i<110000;i++){
		finv[i]=finv[i-1]*inv[i]%mod;
	}
	int N,K;scanf("%d%d",&N,&K);
	K--;
	printf("%lld\n",calc(N,K)*fact[N]%mod);
	
}

Compilation message

asceticism.cpp: In function 'int main()':
asceticism.cpp:62:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int N,K;scanf("%d%d",&N,&K);
          ~~~~~^~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2808 KB Output is correct
2 Correct 8 ms 2916 KB Output is correct
3 Correct 8 ms 2992 KB Output is correct
4 Correct 8 ms 3068 KB Output is correct
5 Correct 9 ms 3104 KB Output is correct
6 Correct 8 ms 3104 KB Output is correct
7 Correct 8 ms 3120 KB Output is correct
8 Correct 8 ms 3168 KB Output is correct
9 Correct 8 ms 3168 KB Output is correct
10 Correct 8 ms 3172 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2808 KB Output is correct
2 Correct 8 ms 2916 KB Output is correct
3 Correct 8 ms 2992 KB Output is correct
4 Correct 8 ms 3068 KB Output is correct
5 Correct 9 ms 3104 KB Output is correct
6 Correct 8 ms 3104 KB Output is correct
7 Correct 8 ms 3120 KB Output is correct
8 Correct 8 ms 3168 KB Output is correct
9 Correct 8 ms 3168 KB Output is correct
10 Correct 8 ms 3172 KB Output is correct
11 Correct 9 ms 3172 KB Output is correct
12 Correct 11 ms 3180 KB Output is correct
13 Correct 9 ms 3180 KB Output is correct
14 Correct 8 ms 3180 KB Output is correct
15 Correct 8 ms 3180 KB Output is correct
16 Correct 8 ms 3180 KB Output is correct
17 Correct 9 ms 3180 KB Output is correct
18 Correct 8 ms 3180 KB Output is correct
19 Correct 9 ms 3180 KB Output is correct
20 Correct 11 ms 3180 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2808 KB Output is correct
2 Correct 8 ms 2916 KB Output is correct
3 Correct 8 ms 2992 KB Output is correct
4 Correct 8 ms 3068 KB Output is correct
5 Correct 9 ms 3104 KB Output is correct
6 Correct 8 ms 3104 KB Output is correct
7 Correct 8 ms 3120 KB Output is correct
8 Correct 8 ms 3168 KB Output is correct
9 Correct 8 ms 3168 KB Output is correct
10 Correct 8 ms 3172 KB Output is correct
11 Correct 9 ms 3172 KB Output is correct
12 Correct 11 ms 3180 KB Output is correct
13 Correct 9 ms 3180 KB Output is correct
14 Correct 8 ms 3180 KB Output is correct
15 Correct 8 ms 3180 KB Output is correct
16 Correct 8 ms 3180 KB Output is correct
17 Correct 9 ms 3180 KB Output is correct
18 Correct 8 ms 3180 KB Output is correct
19 Correct 9 ms 3180 KB Output is correct
20 Correct 11 ms 3180 KB Output is correct
21 Correct 8 ms 3180 KB Output is correct
22 Correct 8 ms 3180 KB Output is correct
23 Correct 8 ms 3180 KB Output is correct
24 Correct 8 ms 3180 KB Output is correct
25 Correct 8 ms 3180 KB Output is correct
26 Correct 8 ms 3180 KB Output is correct
27 Correct 8 ms 3180 KB Output is correct
28 Correct 8 ms 3180 KB Output is correct
29 Correct 8 ms 3180 KB Output is correct
30 Correct 8 ms 3180 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2808 KB Output is correct
2 Correct 8 ms 2916 KB Output is correct
3 Correct 8 ms 2992 KB Output is correct
4 Correct 8 ms 3068 KB Output is correct
5 Correct 9 ms 3104 KB Output is correct
6 Correct 8 ms 3104 KB Output is correct
7 Correct 8 ms 3120 KB Output is correct
8 Correct 8 ms 3168 KB Output is correct
9 Correct 8 ms 3168 KB Output is correct
10 Correct 8 ms 3172 KB Output is correct
11 Correct 9 ms 3172 KB Output is correct
12 Correct 11 ms 3180 KB Output is correct
13 Correct 9 ms 3180 KB Output is correct
14 Correct 8 ms 3180 KB Output is correct
15 Correct 8 ms 3180 KB Output is correct
16 Correct 8 ms 3180 KB Output is correct
17 Correct 9 ms 3180 KB Output is correct
18 Correct 8 ms 3180 KB Output is correct
19 Correct 9 ms 3180 KB Output is correct
20 Correct 11 ms 3180 KB Output is correct
21 Correct 8 ms 3180 KB Output is correct
22 Correct 8 ms 3180 KB Output is correct
23 Correct 8 ms 3180 KB Output is correct
24 Correct 8 ms 3180 KB Output is correct
25 Correct 8 ms 3180 KB Output is correct
26 Correct 8 ms 3180 KB Output is correct
27 Correct 8 ms 3180 KB Output is correct
28 Correct 8 ms 3180 KB Output is correct
29 Correct 8 ms 3180 KB Output is correct
30 Correct 8 ms 3180 KB Output is correct
31 Correct 8 ms 3180 KB Output is correct
32 Correct 8 ms 3196 KB Output is correct
33 Correct 9 ms 3196 KB Output is correct
34 Correct 12 ms 3196 KB Output is correct
35 Correct 24 ms 3232 KB Output is correct
36 Correct 26 ms 3232 KB Output is correct
37 Correct 27 ms 3248 KB Output is correct
38 Correct 10 ms 3252 KB Output is correct
39 Correct 14 ms 3252 KB Output is correct
40 Correct 16 ms 3252 KB Output is correct