QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #207148 | #5749. Directed Vertex Cacti | c20231020 | AC ✓ | 24ms | 159988kb | C++23 | 8.4kb | 2023-10-08 10:23:04 | 2023-10-08 10:23:05 |
Judging History
answer
/*
膜拜传奇特级宗师 Afterglow 大神儿
今天在 florr 首页称您为大夏尊贵的大名儿
一股敬佩之情油生然而
您在 florr 为国争光，扬我大夏威名
向您献上最真挚的膜拜！！！
膜拜传奇特级宗师 Afterglow 大神儿，今，一，您，扬。向！
膜拜传奇特级宗师 Afterglow 大神儿，今，一，您，扬。向！
膜拜传奇特级宗师 Afterglow 大神儿，今，一，您，扬。向！
*/
/*
_____ _____ _____ _____
/\ \ /\ \ /\ \ /\ \
/ \ \ / \ \ / \____\ / \ \
\ \ \ / \ \ / / / \ \ \
\ \ \ / \ \ / / / \ \ \
\ \ \ / /\ \ \ / /____/ \ \ \
\ \ \ / / \ \ \ / | | \ \ \
\ \ \ / / \ \ \ / | | \ \ \
\ \ \ / / / \ \ \ / | | \ \ \
\ \ \ / / / \ \ \ / |____|__ _____ \ \ \
_______________\ \____\/ /____/ \ \ \ / /| \ \ _______________\ \____\
\ / /\ \ \ \ \ \\ / | _________\____\\ / /
\ ____________/____/ \ \ \ \ \____\\/__| | | \ ____________/____/
\ \ \ \ \ \ | | | | | | \ \ \
\ \ \ \ \ \ | | | | | | \ \ \
\ \ \ \ \ \ | |____| | | | \ \ \
\ \ \ \ \ \ / / / \ | | \ \ \
\ \ \ \ \ \/ / / \ | | \ \ \
\ \____\ \ \___/ / / \ | | \ \____\
\ / / \ / / \| | \ / /
\/____/ \_______/____/ \____| \/____/
*/
#define poj
#define zcz
#ifdef poj
//C++
#include<iomanip>
#include<iostream>
//C
#include<cassert>
#include<cmath>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<ctime>
//STL
#include<algorithm>
#include<bitset>
#include<functional>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<string>
#include<vector>
//C++11
#if __cplusplus>=201103L
#include<chrono>
#include<random>
#include<unordered_set>
#include<unordered_map>
#endif
#else
#include<bits/stdc++.h>
#endif
using namespace std;
#ifdef zcz
class fastin{
private:
#ifdef poj
static const int MAXBF=1<<20;
#else
const int MAXBF=1<<27;
#endif
FILE *inf;
char *inbuf,*inst,*ined;
inline char _getchar(){
if(inst==ined)inst=inbuf,ined=inbuf+fread(inbuf,1,MAXBF,inf);
return inst==ined?EOF:*inst++;
}
public:
fastin(FILE*_inf=stdin){
inbuf=new char[MAXBF],inf=_inf,inst=inbuf,ined=inbuf;
}
~fastin(){delete[]inbuf;}
template<typename Int> fastin&operator>>(Int &n){
static char c;
Int t=1;
while((c=_getchar())<'0'||c>'9')if(c=='-')t=-1;
n=(c^48);
while((c=_getchar())>='0'&&c<='9')n=n*10+(c^48);
n*=t;
return *this;
}
fastin&operator>>(char&c){
while((c=_getchar())<'!'||c>'~');
return *this;
}
fastin&operator>>(char*s){
int t=0;
static char c;
while((c=_getchar())==' '||c=='\n');
s[t++]=c;
while((c=_getchar())>='!'&&c<='~')s[t++]=c;
s[t]='\0';
return *this;
}
}fi;
class fastout{
private:
#ifdef poj
static const int MAXBF=1<<20;
#else
const int MAXBF=1<<27;
#endif
FILE *ouf;
char *oubuf,*oust,*oued;
inline void _flush(){fwrite(oubuf,1,oued-oust,ouf);oued=oust;}
inline void _putchar(char c){
if(oued==oust+MAXBF)_flush(),oued=oubuf;
*oued++=c;
#ifdef local
_flush();
#endif
}
public:
fastout(FILE*_ouf=stdout){
oubuf=new char[MAXBF],ouf=_ouf,oust=oubuf,oued=oubuf;
}
~fastout(){_flush();delete[]oubuf;}
template<typename Int> fastout&operator<<(Int n){
if(n<0)_putchar('-'),n=-n;
static char S[20];
int t=0;
do{S[t++]='0'+n%10,n/=10;}while(n);
for(int i=0;i<t;++i)_putchar(S[t-i-1]);
return *this;
}
fastout&operator<<(char c){_putchar(c);return *this;}
fastout&operator<<(char*s){
for(int i=0;s[i];++i)_putchar(s[i]);
return *this;
}
fastout&operator<<(const char*s){
for(int i=0;s[i];++i)_putchar(s[i]);
return *this;
}
}fo;
#define cin fi
#define cout fo
#else
#define czc ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#endif
#define mod7 1000000007
#define mod9 998244353
#define ll long long
#define isinf 0x3f3f3f3f
#define ilinf 0x7fffffff
#define lsinf 0x3f3f3f3f3f3f3f3f
#define llinf 0x7fffffffffffffff
#define pii pair<int,int>
#define fr first
#define sc second
#define next ___
#define pb push_back
#define N 500010
#define M 5000010
#define For(i,a,b) for(ll i=(a);i<=(b);++i)
#define Rep(i,a,b,c) for(ll i=(a);i<=(b);i+=c)
#define Per(i,a,b,c) for(ll i=(a);i>=(b);i-=c)
#define Gra(i) for(ll i=h[x];i;i=next[i])
typedef int arr[N];
typedef int arm[M];
typedef ll arl[N];
typedef ll alm[M];
typedef double ard[N];
typedef double adm[M];
namespace modint{
template<typename Int,Int mod,Int m1>
struct modint{
Int v;
modint(){v=0;}
modint(Int a){v=a;}
bool operator==(modint a){return v==a.v;}
bool operator!=(modint a){return v!=a.v;}
bool operator<(modint a){return v<a.v;}
bool operator>(modint a){return v>a.v;}
bool operator<=(modint a){return v<=a.v;}
bool operator>=(modint a){return v>=a.v;}
bool operator==(Int a){return v==a;}
bool operator!=(Int a){return v!=a;}
bool operator<(Int a){return v<a;}
bool operator>(Int a){return v>a;}
bool operator<=(Int a){return v<=a;}
bool operator>=(Int a){return v>=a;}
friend bool operator==(Int a,modint b){return b==a;}
friend bool operator!=(Int a,modint b){return b!=a;}
friend bool operator<(Int a,modint b){return b>a;}
friend bool operator>(Int a,modint b){return b<a;}
friend bool operator<=(Int a,modint b){return b>=a;}
friend bool operator>=(Int a,modint b){return b<=a;}
modint operator+(modint a){return v>=mod-a.v?v-mod+a.v:v+a.v;}
modint operator-(modint a){return v>=a.v?v-a.v:v+mod-a.v;}
modint modnum(modint a){
return a-((__int128(a.v)*m1)>>80)*mod+0;
}
modint operator*(modint a){return modnum(v*a.v);}
modint operator+=(modint a){*this=*this+a;return *this;}
modint operator-=(modint a){*this=*this-a;return *this;}
modint operator*=(modint a){*this=*this*a;return *this;}
modint qpow(modint a,Int b){
modint r(1);
for(;b;b>>=1,a*=a)if(b&1)r*=a;
return r;
}
modint operator/(modint a){return qpow(a,mod-2)*v;}
modint operator/=(modint a){*this=*this/a;return *this;}
modint&operator++(){*this=*this+1;return *this;}
modint&operator--(){*this=*this-1;return *this;}
const modint operator++(int){modint r=*this;++*this;return r;}
const modint operator--(int){modint r=*this;--*this;return r;}
friend modint operator+(Int a,modint b){return b+a;}
friend modint operator-(Int a,modint b){return b-a;}
friend modint operator*(Int a,modint b){return b*a;}
friend modint operator/(Int a,modint b){return modint(a)/b;}
#ifdef cout
friend fastin&operator>>(fastin&in,modint&n){in>>n.v;return in;}
friend fastout&operator<<(fastout&out,modint n){out<<n.v;return out;}
#else
friend istream&operator>>(istream&in,modint&n){in>>n.v;return in;}
friend ostream&operator<<(ostream&out,modint n){out<<n.v;return out;}
#endif
};
typedef modint<long long,1000000007,1208925811152148> int7;
typedef modint<__int128,1000000009,(__int128(1)<<80)/1000000009> int9;
}
using namespace modint;
ll n,m,p;
int9 f[M],in[M];
int9 c(ll n,ll m){
int9 r=1;
For(i,n-m+1,n)r*=i;
return r*in[m];
}
void solve(){
cin>>n>>m;p=max(n,m);
f[0]=1;
For(i,1,p)f[i]=f[i-1]*i;
in[p]=int9(1)/f[p];
Per(i,p,1,1)in[i-1]=in[i]*i;
cout<<f[n]*c(n*(n-1)/2,m);
return;
}
int main(){
#ifndef zcz
czc;
#endif
int t=1;
while(t--)solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 3ms
memory: 159968kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 3ms
memory: 159960kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 3ms
memory: 159960kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 4ms
memory: 159956kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 11ms
memory: 159848kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 0ms
memory: 159908kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 7ms
memory: 159920kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 23ms
memory: 159920kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 11ms
memory: 159924kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 7ms
memory: 159904kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 11ms
memory: 159960kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 13ms
memory: 159904kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 3ms
memory: 159920kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 3ms
memory: 159920kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 3ms
memory: 159972kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 3ms
memory: 159824kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 8ms
memory: 159892kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 8ms
memory: 159896kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 7ms
memory: 159908kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 7ms
memory: 159988kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 0ms
memory: 159964kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 0ms
memory: 159900kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 4ms
memory: 159844kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 0ms
memory: 159840kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 3ms
memory: 159840kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 7ms
memory: 159844kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 23ms
memory: 159904kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: 0
Accepted
time: 16ms
memory: 159836kb
input:
535164 619302
output:
721871396
result:
ok 1 number(s): "721871396"
Test #29:
score: 0
Accepted
time: 24ms
memory: 159904kb
input:
1000000 1000000
output:
580712335
result:
ok 1 number(s): "580712335"
Test #30:
score: 0
Accepted
time: 15ms
memory: 159892kb
input:
1000000 234534
output:
546630669
result:
ok 1 number(s): "546630669"
Test #31:
score: 0
Accepted
time: 21ms
memory: 159900kb
input:
234523 1000000
output:
127869098
result:
ok 1 number(s): "127869098"
Test #32:
score: 0
Accepted
time: 11ms
memory: 159980kb
input:
44722 10000
output:
0
result:
ok 1 number(s): "0"