QOJ.ac
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 |
|---|---|---|---|---|---|---|---|---|---|
| #488611 | #8815. Space Station | msk_sama | WA | 43ms | 7772kb | C++23 | 1.2kb | 2024-07-24 11:57:00 | 2024-07-24 11:57:00 |
Judging History
answer
#include <bits/stdc++.h>
#define MISAKA main
#define ll long long
using namespace std;
inline int read(){
char ch=getchar();int f=1,x=0;
while(ch<'0'||ch>'9'){if(ch=='-') f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch^48);ch=getchar();}
return x*f;
}
const double eps=1e-9;
const int N=101,inf=1e9,mod=998244353;
int n,m,sum=0,a[N],c[N][N],f[N][N*N];ll ans=0;
ll qpow(ll a,ll b){ll r=1;for(;b;b>>=1,a=a*a%mod)if(b&1)r=r*a%mod;return r;}
int MOD(int x){return x>mod?x-mod:x;}
signed MISAKA(){
n=read(),m=read();
for(int i=1;i<=n;i++) sum+=a[i]=read();
for(int i=0;i<=n;i++){
c[i][0]=1;
for(int j=1;j<=i;j++) c[i][j]=MOD(c[i-1][j]+c[i-1][j-1]);
}
f[0][0]=1;
for(int i=1;i<=n;i++)
for(int j=i;j>=1;j--)
for(int k=sum;k>=a[i];k--)
f[j][k]=MOD(f[j][k]+f[j-1][k-a[i]]);
for(int i=1;i<=n;i++){
ll res=0;
for(int j=1;j<=sum;j++)if(f[i][j])
if(i*m<j) res=MOD(res+1ll*f[i][j]*m%mod);
else res=MOD(res+1ll*f[i][j]*j%mod*qpow(i,mod-2)%mod);
ans=(ans+res*qpow(c[n][i],mod-2))%mod;
}
printf("%lld",ans);
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3964kb
input:
3 3 2 3 4
output:
499122185
result:
ok 1 number(s): "499122185"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3924kb
input:
5 1 10 20 30 40 50
output:
5
result:
ok 1 number(s): "5"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3824kb
input:
1 9 37
output:
9
result:
ok 1 number(s): "9"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3772kb
input:
5 5 24 41 29 6 40
output:
25
result:
ok 1 number(s): "25"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3972kb
input:
10 34 91 86 1 14 98 13 85 64 91 20
output:
707882334
result:
ok 1 number(s): "707882334"
Test #6:
score: 0
Accepted
time: 38ms
memory: 7764kb
input:
100 9 83 99 170 80 174 137 1 91 111 35 69 39 148 76 142 90 105 30 114 176 196 85 26 109 162 167 171 148 169 162 159 3 4 6 33 61 163 7 77 63 8 20 13 51 26 11 149 136 134 187 96 95 113 104 128 48 167 74 18 91 200 62 167 32 5 180 189 39 63 111 68 72 81 128 42 13 57 180 111 91 83 177 34 45 158 29 114 33...
output:
82380556
result:
ok 1 number(s): "82380556"
Test #7:
score: -100
Wrong Answer
time: 43ms
memory: 7772kb
input:
100 33 24 157 144 142 151 8 93 54 189 74 12 129 77 95 59 13 159 48 67 116 174 194 9 166 170 84 136 68 39 181 133 190 37 115 42 95 134 148 91 59 130 1 68 48 14 126 193 50 192 196 44 85 37 96 66 39 180 129 22 2 17 101 45 159 171 68 113 142 197 156 63 96 185 108 72 69 144 33 115 142 139 11 57 76 126 19...
output:
433060731
result:
wrong answer 1st numbers differ - expected: '516465986', found: '433060731'