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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#520047 | #1436. Split in Sets | z | WA | 1ms | 3904kb | C++14 | 1.2kb | 2024-08-15 10:29:55 | 2024-08-15 10:29:55 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N=1e5+5;
const ll MOD=1e9+7;
int n,k;
int a[N],b[N];
ll sum,ans=1,ans2;
ll jc[N],inv[N];
ll A(ll x,ll y){
if(x<y) return 0;
return jc[x]*inv[x-y]%MOD;
}
ll C(ll x,ll y){
if(x<y) return 0;
return jc[x]*inv[y]*inv[x-y]%MOD;
}
ll ksm(ll x,ll y){
ll ret=1;
while(y){
if(y&1) ret=ret*x%MOD;
x=x*x%MOD;
y>>=1;
}
return ret;
}
int main(){
scanf("%d%d",&n,&k);
jc[0]=inv[0]=1;
for(int i=1;i<=n;i++) jc[i]=jc[i-1]*i%MOD;
inv[n]=ksm(jc[n],MOD-2);
for(int i=n-1;i;i--) inv[i]=inv[i+1]*(i+1)%MOD;
for(int i=1;i<=n;i++) scanf("%d",&a[i]);
for(int l=29;l>=0;l--){
sort(a+1,a+n+1);
int p=lower_bound(a+1,a+n+1,1<<l)-a;
if(n-p+1<k){
ans=ans*A(k,n-p+1)%MOD;
for(int i=p;i<=n;i++) sum+=a[i];
k-=n-p+1;
n=p-1;
}else if(p==1){
sum+=(1ll<<l)*k;
for(int i=1;i<=n;i++) a[i]-=1<<l;
}else{
sum+=(1ll<<l)*(k-1);
for(int i=2;i<p;i++) a[1]&=a[i];
for(int i=2;i<=n-p+2;i++) a[i]=a[i+p-2]-(1<<l);
n=n-p+2;
}
}
for(int i=1;i<=k;i++)
(ans2+=(((k-i)&1)?-1:1)*C(k,i)*ksm(i,n)%MOD)%=MOD;
printf("%lld %lld",sum,(ans*ans2%MOD+MOD)%MOD);
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3904kb
input:
3 2 4 7 5
output:
11 2
result:
ok 2 tokens
Test #2:
score: 0
Accepted
time: 0ms
memory: 3780kb
input:
4 1 44 47 74 77
output:
8 1
result:
ok 2 tokens
Test #3:
score: 0
Accepted
time: 0ms
memory: 3784kb
input:
4 4 44 47 74 77
output:
242 24
result:
ok 2 tokens
Test #4:
score: -100
Wrong Answer
time: 1ms
memory: 3856kb
input:
1000 975 633065 7087 25267 3940676 618039 1695 2043 728466935 3498 13604984 4 99 119488 151315 12 32 52705062 26815 1902279 33952 480604 390647001 60 1 12566875 7591859 6 119892 7829822 2129 4 11644639 17 33200 5330 338 2 9 6862 3781 148087 57 198 13224999 10493180 1 5755424 216 1757297 210 1002623 ...
output:
35467198613 546955607
result:
wrong answer 2nd words differ - expected: '671056390', found: '546955607'