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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 |
---|---|---|---|---|---|---|---|---|---|
#471182 | #6698. Flipping Game | mufeng12 | WA | 121ms | 4448kb | C++23 | 2.3kb | 2024-07-10 19:07:38 | 2024-07-10 19:07:39 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define ld long double
#define inf 0x3f3f3f3f
#define all(x) (x).begin(),(x).end()
#define maxint INT32_MAX
#define minint INT32_MIN
#define maxll INT64_MAX
#define minll INT64_MIN
#define mod 998244353
#define nc() (p1==p2 && (p2=(p1=buf)+fread(buf,1,100000,stdin),p1==p2)?EOF:*p1++)
#pragma GCC optimize(2)
void write(int x);
ll c[120][120];
char *p1,*p2,buf[100000];
int read();
const int N=1e5+10;
int fact[N],infact[N];
int qpow(int a,int b)
{
int ans=1;
while(b)
{
if(b&1)ans=(long long)ans*a%mod;
b>>=1;
a=(long long)a*a%mod;
}
return ans;
}
void init()
{
fact[0]=infact[0]=1;
for(int i=1;i<N;i++)
{
fact[i]=(long long)fact[i-1]*i%mod;
infact[i]=(long long)infact[i-1]*qpow(i,mod-2)%mod;
}
}
int C(int a,int b)
{
if(a<0||b<0||a<b) return 0;
return (long long)fact[a]*infact[b]%mod*infact[a-b]%mod;// fact[a]:a! infact[a]:1/(a!)
}
void solve(){
int n,m,k;
cin>>n>>k>>m;
string s1,s2;
cin>>s1>>s2;
int sum=0;
// int dp[120][120];
vector<vector<int>> dp(k+1,vector<int>(n+1,0));
for(int i=0;i<n;i++){
sum+=abs(s1[i]-s2[i]);
}
dp[0][sum]=1;
for(int i=1;i<=k;i++){
for(int j=0;j<=n;j++){
for(int x=0;x<=j&&x<=m;x++){
if(n-j<m-x) continue;
dp[i][j+m-2*x]+=(dp[i-1][j]*C(j,x)%mod*C(n-j,m-x)%mod)%mod;
dp[i][j+m-2*x]%=mod;
}
}
}
cout<<dp[k][0]<<endl;
}
int main() {
int t=1;
//yhsj();
init();
cin>>t;
while(t--) solve();
return 0;
}
void write(int x)
{
if(x<0)
putchar('-'),x=-x;
if(x>9)
write(x/10);
putchar(x%10+'0');
return;
}
int read()
{
int x=0,f=1;
char ch=nc();
while(ch<48||ch>57)
{
if(ch=='-')
f=-1;
ch=nc();
}
while(ch>=48&&ch<=57)
x=x*10+ch-48,ch=nc();
return x*f;
}
// ll ksm(ll a,ll b,ll mod){
// ll ans=1;
// a%=mod;
// while(b>0){
// if(b&1) ans=ans*a%mod;
// a=a*a%mod;
// b>>=1;
// }
// return ans;
// }
详细
Test #1:
score: 100
Accepted
time: 13ms
memory: 4244kb
input:
3 3 2 1 001 100 3 1 2 001 100 3 3 2 001 100
output:
2 1 7
result:
ok 3 number(s): "2 1 7"
Test #2:
score: -100
Wrong Answer
time: 121ms
memory: 4448kb
input:
1000 8 50 2 11111001 01100001 13 4 5 0010011001101 0000001010010 15 58 12 011111110110100 011010000101000 15 30 2 000101100111101 100010100110000 16 99 15 0111011010111101 1000100101011100 7 73 1 0010010 1010111 1 45 1 1 1 15 64 4 111000001000100 111000110011011 13 16 6 0000001101000 0101001010111 5...
output:
0 0 0 0 0 327891996 0 -582780816 -254531258 0 0 0 -660113869 0 0 0 -374518128 0 0 0 -367728663 -190397285 327015050 1 851396584 -396793066 0 0 0 0 0 0 210208961 -975937121 0 0 -230695675 0 -516933171 0 0 0 0 0 343591592 905882847 789188692 0 0 0 0 0 0 0 359331574 0 471795944 -945483248 0 0 0 1 0 177...
result:
wrong answer 6th numbers differ - expected: '565123576', found: '327891996'