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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 |
---|---|---|---|---|---|---|---|---|---|
#849619 | #1262. Justice For Everyone | luanyanjia | AC ✓ | 369ms | 8736kb | C++14 | 2.7kb | 2025-01-09 16:40:37 | 2025-01-09 16:40:37 |
Judging History
answer
#include<bits/stdc++.h>
#define pii std::pair<int,int>
#define mkp std::make_pair
#define fir first
#define sec second
typedef long long ll;
inline void rd(){}
template<typename T,typename ...U>
inline void rd(T &x,U &...args){
int ch=getchar();
T f=1;x=0;
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9')x=(x<<1)+(x<<3)+(ch^48),ch=getchar();
x*=f;rd(args...);
}
const int N=35,M=6005,mod=998244353,V=6000;
int n,a[N],b[N],d[N],t;
int fac[M],INV[M],inv[M],Inv[M][205];
inline int KSM(int x,int n){
int ans=1;
while(n){
if(n&1)ans=1ll*ans*x%mod;
x=1ll*x*x%mod;
n>>=1;
}return ans;
}
inline void Init(){
fac[0]=inv[0]=INV[0]=1;
for(int i=1;i<=V;i++)fac[i]=1ll*fac[i-1]*i%mod;
inv[V]=KSM(fac[V],mod-2);
for(int i=V-1;i>=1;i--)inv[i]=1ll*inv[i+1]*(i+1)%mod;
for(int i=1;i<=V;i++)INV[i]=1ll*inv[i]*fac[i-1]%mod;
}
int Y[M],A[M],B[M],mp[N][N];
inline int Det(){
int f=1;
for(int i=1;i<=n;i++){
int cur=i;
while(!mp[cur][i]&&cur<n)++cur;
if(!mp[cur][i])return 0;
if(cur!=i)std::swap(mp[cur],mp[i]),f=mod-f;
for(int j=i+1;j<=n;j++){
int div=1ll*mp[j][i]*KSM(mp[i][i],mod-2)%mod;
for(int k=i;k<=n;k++){
mp[j][k]=(mp[j][k]+1ll*mp[i][k]*(mod-div)%mod)%mod;
}
}
}
int ans=1;
for(int i=1;i<=n;i++)ans=1ll*ans*mp[i][i]%mod;
return 1ll*ans*f%mod;
}
inline int Calc(int x){
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
if(b[j]<a[i]){
mp[i][j]=0;
continue;
}
mp[i][j]=Inv[x][b[j]-a[i]];
}
}
return Det();
}
int map[M];
signed main(){
rd(n);
for(int i=1;i<=n;i++)rd(a[i]);
for(int i=1;i<=n;i++)rd(b[i]),map[a[i]]=b[i];
for(int i=1;i<=n;i++){
d[i]=b[i]-a[i];
t+=d[i];
if(d[i]<0)return puts("0"),0;
}
if(t&1)return puts("0"),0;
t/=2;
Init();
for(int x=1;x<=t+1;x++){
for(int r=0;r<=200;r++){
int now=0,v=1;
for(int k=0;k<=r/2;k++){
now=(now+1ll*v*inv[k]%mod*inv[r-2*k]%mod)%mod;
v=1ll*v*(mod-x)%mod;
}
Inv[x][r]=now;
}
}
for(int i=1;i<=t+1;i++){
Y[i]=Calc(i);
for(int j=1;j<i;j++)Y[i]=1ll*Y[i]*INV[i-j]%mod;
for(int j=i+1;j<=t+1;j++)Y[i]=1ll*Y[i]*(mod-INV[j-i])%mod;
}
B[0]=1;
for(int i=1;i<=t+1;i++){
for(int j=i-1;j>=0;j--){
A[j]=(1ll*B[j]*Y[i]+1ll*A[j]*(mod-i))%mod;
if(j)(A[j]+=A[j-1])%=mod;
}
for(int j=i;j>=0;j--){
B[j]=1ll*B[j]*(mod-i)%mod;
if(j)(B[j]+=B[j-1])%=mod;
}
}
int ans=0;
for(int i=0;i<=t;i++){
ans=(ans+1ll*fac[2*t-2*i]%mod*inv[t-i]%mod*A[i]%mod)%mod;
}ans=1ll*ans*fac[t]%mod*KSM(KSM(2,t),mod-2)%mod;
std::sort(a+1,a+n+1);
std::sort(b+1,b+n+1);
for(int i=1;i<=n;i++)if(map[a[i]]!=b[i])ans=0;
printf("%d\n",ans);
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3940kb
input:
3 1 2 3 3 4 5
output:
1
result:
ok answer is '1'
Test #2:
score: 0
Accepted
time: 1ms
memory: 4056kb
input:
3 1 2 3 7 8 9
output:
42
result:
ok answer is '42'
Test #3:
score: 0
Accepted
time: 1ms
memory: 3884kb
input:
3 1 4 7 3 6 9
output:
6
result:
ok answer is '6'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3868kb
input:
1 1 3
output:
0
result:
ok answer is '0'
Test #5:
score: 0
Accepted
time: 0ms
memory: 3932kb
input:
1 1 1
output:
1
result:
ok answer is '1'
Test #6:
score: 0
Accepted
time: 0ms
memory: 3868kb
input:
2 1 4 4 7
output:
1
result:
ok answer is '1'
Test #7:
score: 0
Accepted
time: 28ms
memory: 6052kb
input:
10 10 9 8 7 6 1 2 3 4 5 11 12 13 114 115 120 129 128 127 126
output:
0
result:
ok answer is '0'
Test #8:
score: 0
Accepted
time: 0ms
memory: 3652kb
input:
30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 131
output:
0
result:
ok answer is '0'
Test #9:
score: 0
Accepted
time: 209ms
memory: 8736kb
input:
30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130
output:
936606510
result:
ok answer is '936606510'
Test #10:
score: 0
Accepted
time: 0ms
memory: 3652kb
input:
30 16 21 33 44 51 60 71 81 91 100 110 122 131 144 155 160 162 171 172 174 177 179 187 188 189 191 192 193 194 199 110 111 112 113 114 115 116 117 118 119 120 122 131 144 155 160 162 171 172 174 177 179 187 188 189 191 192 193 194 199
output:
0
result:
ok answer is '0'
Test #11:
score: 0
Accepted
time: 40ms
memory: 4108kb
input:
30 16 21 33 44 51 60 71 81 91 100 110 122 131 144 155 160 162 171 172 174 177 179 187 188 189 191 192 193 194 199 110 111 112 113 114 115 116 117 118 119 120 122 131 144 155 160 162 171 172 174 177 179 187 188 189 191 192 193 194 200
output:
836228983
result:
ok answer is '836228983'
Test #12:
score: 0
Accepted
time: 33ms
memory: 6120kb
input:
10 10 9 8 7 6 5 4 3 2 1 110 109 108 107 106 105 104 103 102 101
output:
422463757
result:
ok answer is '422463757'
Test #13:
score: 0
Accepted
time: 369ms
memory: 7000kb
input:
30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200
output:
575061951
result:
ok answer is '575061951'