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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 |
---|---|---|---|---|---|---|---|---|---|
#234694 | #6698. Flipping Game | AlanX | WA | 136ms | 6028kb | C++20 | 1.9kb | 2023-11-01 20:56:30 | 2023-11-01 20:56:30 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
//cout << fixed <<setprecision(2) << ans;
//inline ll read() {
// ll ans=0,f=1;
// char c=getchar();
// while(c<'0' || c>'9') {
// if(c=='-') f=-1;
// c=getchar();
// }
// while(c>='0' && c<='9') {
// ans=(ans<<1)+(ans<<3)+(c^48);
// c=getchar();
// }
// return ans*f;
//}
//char F[200];
//inline void out(I_int x) {
// if (x == 0) return (void) (putchar('0'));
// I_int tmp = x > 0 ? x : -x;
// if (x < 0) putchar('-');
// int cnt = 0;
// while (tmp > 0) {
// F[cnt++] = tmp % 10 + '0';
// tmp /= 10;
// }
// while (cnt > 0) putchar(F[--cnt]);
// //cout<<" ";
//}
#define endl '\n'
const int N=1e5+5,mod=998244353;
ll n,m;
string s,st;
ll dp[205][205];
ll fac[2*N],invfac[2*N];
ll quick_pow(ll a,ll b){
if(a==0)return 0;
ll ans=1;
while(b){
if(b&1)ans=ans*a%mod;
a=a*a%mod;
b=b>>1;
}
return ans;
}
ll inv(ll x){
return quick_pow(x,mod-2);
}
void init(){
fac[0]=invfac[0]=1;
for(int i=1;i<N;i++){
fac[i]=fac[i-1]*i%mod;
}
invfac[N-1]=inv(fac[N-1]);
for(int i=N-2;i>=1;i--){
invfac[i]=invfac[i+1]*(i+1)%mod;
}
}
ll C(ll a,ll b){
if(b<a)return 0;
return fac[b]*invfac[b-a]%mod*invfac[a]%mod;
}
void solve(){
ll k;
cin>>n>>m>>k;
cin>>s;
cin>>st;
ll cnt=0;
for(int i=0;i<n;i++){
if(s[i]!=st[i])cnt++;
}
for(int i=0;i<=m;i++){
for(int j=0;j<=n;j++){
dp[i][j]=0;
}
}
dp[0][0]=1;
for(int i=1;i<=m;i++){
for(int j=0;j<=n;j++){
for(int u=0;u<=j;u++){
if(k-u>n-j)continue;
if(j+k-2*u<0||j+k-2*u>n)continue;
dp[i][j+k-2*u]+=dp[i-1][j]*C(u,j)%mod*C(k-u,n-j)%mod;
dp[i][j+k-2*u]%=mod;
}
}
}
cout<<dp[m][cnt]*inv(C(cnt,n)%mod)%mod<<endl;
return ;
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int _=1;
init();
cin>>_;
while(_--)
solve();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 2ms
memory: 6028kb
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: 136ms
memory: 5352kb
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 391519374 0 480195112 108378888 0 0 0 602531928 0 0 0 657964873 0 0 0 632552123 168156741 16636231 1 305652451 259008109 0 0 0 0 0 0 990349196 687400400 0 0 838398229 0 89219730 0 0 0 0 0 144619535 411739397 735449326 0 0 0 0 0 0 0 419349749 0 77531359 352542254 0 0 0 1 0 176263839 0 0 0 0...
result:
wrong answer 6th numbers differ - expected: '565123576', found: '391519374'