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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
#476492#2568. Mountainsmsk_samaAC ✓5ms5448kbC++231.6kb2024-07-13 19:50:542024-07-13 19:50:55

Judging History

你现在查看的是最新测评结果

  • [2024-07-13 19:50:55]
  • 评测
  • 测评结果:AC
  • 用时:5ms
  • 内存:5448kb
  • [2024-07-13 19:50:54]
  • 提交

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 ll N=310,inf=1e9,mod=1e9+7;
ll f[N],inv[N],n,m,k;
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;}
ll C(ll a,ll b){return b>=0&&a>=0&&a>=b?f[a]*inv[b]%mod*inv[a-b]%mod:0;}
struct matrix{
    ll _m[N][N];
    matrix(){memset(_m,0,sizeof(_m));}
    ll det(){
        ll res=1,a[N][N];
        memcpy(a,_m,sizeof(_m));
        for(int i=1;i<=k;i++){
            for(int j=i+1;j<=k;j++){
                while(a[i][i]){
                    ll t=a[j][i]/a[i][i];
                    for(int _k=1;_k<=k;_k++) a[j][_k]=(a[j][_k]-t*a[i][_k]%mod+mod)%mod;
                    swap(a[i],a[j]),res=-res;
                }
                swap(a[i],a[j]),res=-res;
            }
        }
        for(int i=1;i<=k;i++) res=res*a[i][i]%mod;
        return (res<0?res+mod:res);
    }
}A;
signed MISAKA(){
    f[0]=1;
    for(ll i=1;i<=N-10;i++) f[i]=f[i-1]*i%mod;
    inv[N-10]=qpow(f[N-10],mod-2);
    for(ll i=N-11;i>=0;i--) inv[i]=inv[i+1]*(i+1)%mod;
    n=read(),m=read(),k=read();
    for(int i=1;i<=k;i++)
        for(int j=1;j<=k;j++){
            int x1=i-1,y1=1-i,x2=m+j-1,y2=n-j+1;    
            // cerr<<x1<<' '<<y1<<' '<<x2<<' '<<y2<<'\n';
            A._m[i][j]=C(x2-x1+y2-y1,x2-x1);
        }
    printf("%lld",A.det());
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 5252kb

input:

1 1 1

output:

2

result:

ok 1 number(s): "2"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5300kb

input:

2 2 2

output:

20

result:

ok 1 number(s): "20"

Test #3:

score: 0
Accepted
time: 1ms
memory: 5448kb

input:

2 3 4

output:

490

result:

ok 1 number(s): "490"

Test #4:

score: 0
Accepted
time: 1ms
memory: 5304kb

input:

1 2 8

output:

45

result:

ok 1 number(s): "45"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5444kb

input:

1 10 2

output:

66

result:

ok 1 number(s): "66"

Test #6:

score: 0
Accepted
time: 1ms
memory: 5304kb

input:

9 5 7

output:

371850968

result:

ok 1 number(s): "371850968"

Test #7:

score: 0
Accepted
time: 1ms
memory: 5384kb

input:

3 3 1

output:

20

result:

ok 1 number(s): "20"

Test #8:

score: 0
Accepted
time: 0ms
memory: 5236kb

input:

7 7 9

output:

166345303

result:

ok 1 number(s): "166345303"

Test #9:

score: 0
Accepted
time: 1ms
memory: 5252kb

input:

25 15 25

output:

850087558

result:

ok 1 number(s): "850087558"

Test #10:

score: 0
Accepted
time: 3ms
memory: 5316kb

input:

45 59 71

output:

659153227

result:

ok 1 number(s): "659153227"

Test #11:

score: 0
Accepted
time: 1ms
memory: 5324kb

input:

73 3 25

output:

683124269

result:

ok 1 number(s): "683124269"

Test #12:

score: 0
Accepted
time: 0ms
memory: 5312kb

input:

1 48 78

output:

446896916

result:

ok 1 number(s): "446896916"

Test #13:

score: 0
Accepted
time: 1ms
memory: 5308kb

input:

25 100 32

output:

966287506

result:

ok 1 number(s): "966287506"

Test #14:

score: 0
Accepted
time: 1ms
memory: 5312kb

input:

85 64 40

output:

125679545

result:

ok 1 number(s): "125679545"

Test #15:

score: 0
Accepted
time: 0ms
memory: 5448kb

input:

5 9 94

output:

620471576

result:

ok 1 number(s): "620471576"

Test #16:

score: 0
Accepted
time: 1ms
memory: 5304kb

input:

33 57 40

output:

637315057

result:

ok 1 number(s): "637315057"

Test #17:

score: 0
Accepted
time: 4ms
memory: 5288kb

input:

61 6 97

output:

362472796

result:

ok 1 number(s): "362472796"

Test #18:

score: 0
Accepted
time: 2ms
memory: 5312kb

input:

85 50 51

output:

192099209

result:

ok 1 number(s): "192099209"

Test #19:

score: 0
Accepted
time: 2ms
memory: 5320kb

input:

96 54 59

output:

714762612

result:

ok 1 number(s): "714762612"

Test #20:

score: 0
Accepted
time: 0ms
memory: 5312kb

input:

20 99 12

output:

772155662

result:

ok 1 number(s): "772155662"

Test #21:

score: 0
Accepted
time: 2ms
memory: 5304kb

input:

48 39 62

output:

670046604

result:

ok 1 number(s): "670046604"

Test #22:

score: 0
Accepted
time: 1ms
memory: 5380kb

input:

76 83 16

output:

976820079

result:

ok 1 number(s): "976820079"

Test #23:

score: 0
Accepted
time: 0ms
memory: 5304kb

input:

96 36 61

output:

20854557

result:

ok 1 number(s): "20854557"

Test #24:

score: 0
Accepted
time: 3ms
memory: 5312kb

input:

18 40 77

output:

261684871

result:

ok 1 number(s): "261684871"

Test #25:

score: 0
Accepted
time: 0ms
memory: 5224kb

input:

42 84 26

output:

458573307

result:

ok 1 number(s): "458573307"

Test #26:

score: 0
Accepted
time: 3ms
memory: 5444kb

input:

71 25 80

output:

875902815

result:

ok 1 number(s): "875902815"

Test #27:

score: 0
Accepted
time: 1ms
memory: 5252kb

input:

95 73 26

output:

922299967

result:

ok 1 number(s): "922299967"

Test #28:

score: 0
Accepted
time: 0ms
memory: 5296kb

input:

19 17 83

output:

494148696

result:

ok 1 number(s): "494148696"

Test #29:

score: 0
Accepted
time: 5ms
memory: 5324kb

input:

100 100 100

output:

192912055

result:

ok 1 number(s): "192912055"

Test #30:

score: 0
Accepted
time: 4ms
memory: 5444kb

input:

100 98 99

output:

412293529

result:

ok 1 number(s): "412293529"