QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#462013 | #8473. Matrices and Determinants | ucup-team052# | AC ✓ | 29ms | 3912kb | C++14 | 3.1kb | 2024-07-03 12:44:22 | 2024-07-03 12:44:23 |
Judging History
answer
#include<bits/stdc++.h>
#ifdef xay5421
#define D(...) fprintf(stderr,__VA_ARGS__)
#define DD(...) D(#__VA_ARGS__ "="),debug_helper::debug(__VA_ARGS__),D("\n")
#include"/home/xay5421/debug.hpp"
#else
#define D(...) ((void)0)
#define DD(...) ((void)0)
#endif
#define pb push_back
#define eb emplace_back
#define SZ(x) ((int)(x).size())
#define each(x,v) for(auto&x:v)
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
template<class T>void rd(T&x){int f=0,c;while(!isdigit(c=getchar()))f^=!(c^45);x=(c&15);while(isdigit(c=getchar()))x=x*10+(c&15);if(f)x=-x;}
template<class T>void pt(T x,int c=-1){if(x<0)putchar('-'),x=-x;if(x>9)pt(x/10);putchar(x%10+48);if(c!=-1)putchar(c);}
using namespace std;
using LL=long long;
using ULL=unsigned long long;
int T,n;
struct mat{
LL a[4][4];
mat operator*(const mat&b)const{
mat c;
memset(c.a,0,sizeof(a));
rep(i,0,n-1)rep(j,0,n-1)rep(k,0,n-1){
c.a[i][j]+=a[i][k]*b.a[k][j];
}
return c;
}
bool operator==(const mat&rhs)const{
rep(i,0,n-1)rep(j,0,n-1)if(a[i][j]!=rhs.a[i][j])return 0;
return 1;
}
void add_row(int i,int j,LL k){
rep(t,0,n-1){
a[j][t]+=a[i][t]*k;
}
}
void add_col(int i,int j,LL k){
rep(t,0,n-1){
a[t][j]+=a[t][i]*k;
}
}
void swap_row(int i,int j){swap(a[i],a[j]);}
void swap_col(int i,int j){rep(k,0,n-1)swap(a[k][i],a[k][j]);}
void print(){
rep(i,0,n-1){
rep(j,0,n-1)D("%lld ",a[i][j]);
D("\n");
}
D("\n");
}
};
void exgcd(LL a,LL b,LL&x,LL&y){
if(!b){x=1,y=0;return;}
exgcd(b,a%b,y,x);
y-=a/b*x;
}
LL inv(LL x,LL m){
LL v0,v1;
exgcd(x,m,v0,v1);
v0=(v0%m+m)%m;
assert(1LL*v0*x%m==1);
return v0;
}
void solve(){
cin>>n;
mat A,I;
memset(A.a,0,sizeof(A));
memset(I.a,0,sizeof(I));
rep(i,0,n-1){
rep(j,0,n-1){
cin>>A.a[i][j];
I.a[i][j]=i==j;
}
}
mat A0=A;
mat B(I),C(I);
// (B*A*C).print();
LL det=1;
rep(i,0,n-1){
if(!A.a[i][i]){
rep(j,i+1,n-1)if(A.a[j][i]){
A.swap_row(i,j);
B.swap_col(i,j);
det=-det;
break;
}
if(!A.a[i][i]){
puts("No");
return;
}
}
rep(j,i+1,n-1){
while(1){
if(abs(A.a[i][i])<abs(A.a[j][i])){
A.swap_row(i,j);
B.swap_col(i,j);
det=-det;
}
if(!A.a[j][i])break;
LL t=A.a[i][i]/A.a[j][i];
A.add_row(j,i,-t);
B.add_col(i,j,t);
}
}
det*=A.a[i][i];
}
if(det<=0){
puts("No");
return;
}
LL val=sqrt(det+0.5);
if(val*val!=det){
puts("No");
return;
}
per(i,n-1,0){
LL t=abs(__gcd(val,A.a[i][i]));
rep(j,i+1,n-1){
if(A.a[i][j]%t!=0){
LL tmp=inv((A.a[j][j]%t+t)%t,t)*(A.a[i][j]%t)%t;
A.add_row(j,i,-tmp);
B.add_col(i,j,tmp);
}
}
rep(j,0,n-1){
assert(A.a[i][j]%t==0);
A.a[i][j]/=t;
B.a[j][i]*=t;
}
val/=t;
}
assert(A0==(B*A*C));
puts("Yes");
rep(i,0,n-1)rep(j,0,n-1)printf("%lld%c",B.a[i][j],j==n-1?'\n':' ');
rep(i,0,n-1)rep(j,0,n-1)printf("%lld%c",A.a[i][j],j==n-1?'\n':' ');
}
int main(){
#ifdef xay5421
freopen("a.in","r",stdin);
#endif
cin>>T;
rep(tc,1,T){
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3760kb
input:
3 2 2 0 0 2 2 2 1 1 2 1 1
output:
Yes 1 0 0 2 2 0 0 1 No Yes 1 1
result:
ok OK, Accepted. (3 test cases)
Test #2:
score: 0
Accepted
time: 25ms
memory: 3856kb
input:
10000 3 10 0 1 0 0 4 2 10 0 3 2 -2 5 -6 9 0 2 1 10 4 -7 0 7 7 0 0 -10 0 0 0 -10 -10 8 -7 3 9 3 -3 3 3 5 -7 -9 -8 -6 -2 4 9 -8 4 -3 -3 -4 0 0 0 7 0 0 10 -4 7 0 4 3 -10 1 -3 5 5 -3 9 0 -5 -5 -10 3 0 4 -8 3 10 9 0 0 10 0 -5 -1 4 1 -10 4 0 7 0 0 0 -2 7 0 1 -2 7 5 5 -10 -1 0 4 3 1 4 0 -2 3 2 -4 -1 2 -10 ...
output:
No No Yes -7 7 0 0 0 0 1 0 0 0 1 10 8 -7 0 0 1 -7 10 16 0 -7 11 17 0 0 -10 0 0 0 0 -1 No No No Yes -2 7 40 0 10 60 1 0 0 -5 -1 4 0 1 24 0 0 -4 No No No Yes 0 9 18 0 5 9 1 0 0 -3 -3 -2 0 1 -6 0 0 3 No Yes 5 10 40 7 15 60 4 8 30 -1 4 12 0 -2 14 0 0 -5 No No No Yes 1 0 0 10 -10 7 0 -1 No Yes 1 0 0 0 0 ...
result:
ok OK, Accepted. (10000 test cases)
Test #3:
score: 0
Accepted
time: 18ms
memory: 3680kb
input:
10000 3 0 -3 5 5 0 0 2 1 0 4 2 0 -2 0 -7 4 6 4 -2 8 -3 -10 3 -8 3 -7 4 -7 -4 5 2 5 0 0 4 0 0 0 7 -8 7 0 1 2 4 6 -8 -6 4 0 7 2 -3 0 0 0 -9 0 0 -9 0 7 8 9 2 4 -7 8 -10 -8 6 8 -1 6 8 -10 -7 3 2 7 7 7 3 0 0 -10 0 4 -2 -10 -2 5 3 -4 2 2 7 1 10 10 9 -1 2 9 -1 0 9 4 -7 2 -10 0 -5 1 -3 9 -10 -6 -3 3 8 -10 -...
output:
Yes 0 3 -5 5 -10 20 2 -5 10 1 -2 0 0 -1 10 0 0 5 No No No Yes 0 7 6 -4 0 0 0 9 0 0 1 0 1 0 0 0 7 8 9 2 0 1 8 -1 0 0 -9 0 0 0 0 -1 No No No Yes 1 0 0 9 9 -1 0 1 No No No No No Yes 7 6 24 3 3 12 4 4 12 1 -6 12 0 6 -6 0 0 -2 No Yes 0 0 0 1 -3 12 105 25 1 0 0 0 0 7 63 15 -3 -4 -7 -3 0 -1 -63 -20 0 0 7 2...
result:
ok OK, Accepted. (10000 test cases)
Test #4:
score: 0
Accepted
time: 25ms
memory: 3736kb
input:
10000 3 10 3 10 0 10 0 9 7 0 4 -2 0 5 1 8 -8 -1 0 2 -9 -1 2 3 8 -5 -4 3 -7 0 7 6 7 -9 1 0 0 4 9 -10 1 -5 9 9 1 10 0 5 -8 -9 -8 -7 -6 -10 2 -10 -3 0 -10 4 5 2 4 2 4 -5 -7 8 -1 8 -5 -8 -9 6 0 6 3 9 0 0 1 0 3 6 3 2 2 8 -3 8 -5 4 6 0 0 6 0 -6 0 -6 0 0 0 10 8 -9 -10 -4 4 -9 -10 4 -1 0 -3 -4 -7 8 -3 -3 7 ...
output:
No No No No Yes 1 0 0 10 -10 -3 0 -1 No No No No No Yes 1 0 0 3 3 -7 0 1 No Yes 1 0 0 10 10 8 0 1 No Yes 3 1 0 1 3 2 0 1 No No No Yes 8 8 7 8 1 -8 0 8 No Yes 1 0 0 0 0 5 -5 2 0 -2 2 -2 0 5 -6 0 0 1 No No No No No Yes 2 6 3 6 3 6 0 -2 No No No Yes 0 0 6 -12 0 5 -1 -4 1 0 0 0 0 10 -25 40 -10 -2 -9 2 0...
result:
ok OK, Accepted. (10000 test cases)
Test #5:
score: 0
Accepted
time: 20ms
memory: 3860kb
input:
10000 3 1 -1 0 0 4 0 1 3 9 3 5 6 6 10 -2 -5 10 -4 -7 3 -6 0 1 7 9 -8 0 0 -6 4 -10 4 9 -4 4 -2 3 -7 0 -8 0 -2 -1 -2 3 -4 4 0 0 0 -4 9 -10 0 7 1 0 0 3 -8 7 10 -5 4 -10 8 7 -1 5 4 7 10 -1 -7 0 1 -1 8 7 -4 3 7 0 0 10 7 -1 1 0 1 3 -5 0 -6 6 0 -1 1 7 1 3 -10 1 0 0 -8 -4 0 0 5 4 -9 4 -6 -5 -2 -10 2 4 4 7 -...
output:
Yes 1 2 -1 0 -2 4 1 0 0 1 3 9 0 -2 -6 0 0 -3 No Yes -6 3 -1 7 -3 1 0 0 6 1 9 -7 0 18 -14 0 0 -1 No Yes 0 0 0 4 9 -10 15 0 1 0 0 0 -8 7 -10 0 1 0 0 3 0 1 30 17 0 0 20 10 0 0 0 -1 No Yes 7 0 7 10 1 7 1 0 0 1 0 1 0 7 -4 0 0 -1 No Yes 1 0 0 0 4 0 0 0 5 -10 1 0 0 -2 -1 0 0 1 No Yes 4 -7 30 -3 7 -30 5 -9 ...
result:
ok OK, Accepted. (10000 test cases)
Test #6:
score: 0
Accepted
time: 12ms
memory: 3708kb
input:
10000 3 6 0 0 -10 4 -7 8 0 6 2 8 -2 5 7 4 1 0 0 10 10 0 -10 -10 -6 -10 1 6 10 0 0 0 4 4 3 3 -3 -6 -8 -9 1 -9 -4 6 -6 9 0 -1 0 4 0 7 0 0 -2 7 -10 -1 -10 7 0 -1 0 2 0 7 4 2 -10 6 -2 5 -1 -7 3 3 8 -9 0 9 -6 5 -8 1 9 4 -5 7 -2 -2 -6 -2 -10 4 -1 -10 5 10 -1 -7 2 10 4 1 0 -3 -7 10 -10 4 -3 0 0 1 0 0 0 -3 ...
output:
Yes 3 6 -3 -5 -12 6 4 8 -2 2 4 -7 0 -2 5 0 0 3 No Yes 1 0 0 0 10 0 1 0 -6 1 0 0 10 0 0 100 1 0 0 10 0 -10 1 66 0 0 -10 -110 0 0 0 -1 No Yes 0 7 0 21 1 0 0 0 5 -28 10 -82 0 2 0 7 -2 7 -10 -1 0 1 0 -21 0 0 5 -1 0 0 0 7 No Yes 3 3 No Yes 1 0 0 0 10 1 0 0 0 0 1 0 0 0 -3 10 1 0 -3 -7 0 -10 34 67 0 0 1 0 ...
result:
ok OK, Accepted. (10000 test cases)
Test #7:
score: 0
Accepted
time: 25ms
memory: 3712kb
input:
10000 3 7 0 0 10 4 5 8 0 7 1 6 3 0 1 0 7 -3 0 5 -8 7 3 -2 -10 2 9 -3 2 -10 5 5 3 1 0 0 0 -2 0 4 9 -8 4 -2 -2 -4 -7 -1 -8 -4 7 4 10 -2 8 -1 4 -6 2 3 3 4 5 0 -2 0 -10 -6 0 4 10 0 10 -6 1 -2 9 10 -6 -7 -3 9 -5 9 -6 6 4 3 7 3 1 0 0 3 0 0 -10 3 0 0 1 3 -10 4 -1 -7 -10 1 5 2 1 -3 1 -4 5 4 6 -2 6 6 4 0 0 0...
output:
Yes 7 28 42 10 42 63 8 32 49 1 -8 -10 0 2 -8 0 0 7 No No No Yes 1 0 0 0 -2 4 4 9 -16 1 0 0 0 1 -8 0 0 -4 No No No No No Yes 0 0 0 10 1 0 0 0 0 0 1 0 0 7 -6 0 -7 2 -9 -1 0 -1 8 -1 0 0 10 0 0 0 0 1 No Yes 3 3 No Yes 1 0 0 4 4 5 0 1 No No No Yes -3 10 39 119 2 1 4 14 9 0 0 7 1 0 0 0 1 0 0 0 0 1 -28 313...
result:
ok OK, Accepted. (10000 test cases)
Test #8:
score: 0
Accepted
time: 25ms
memory: 3808kb
input:
10000 3 0 2 0 8 -7 -6 -3 -8 0 2 -2 9 1 6 4 -9 0 2 7 -2 0 0 0 -1 0 -8 0 -7 7 9 1 4 -8 -7 -9 2 9 7 -8 -8 2 2 0 10 9 9 -10 7 2 -9 0 -6 -9 3 6 7 9 2 7 -9 0 8 10 1 9 4 9 1 -10 -10 2 1 10 -1 -1 7 -1 -3 5 -7 10 8 3 0 0 10 -9 -4 9 -10 0 -4 4 -1 -3 2 -10 8 -7 4 4 1 -9 7 -1 -2 -1 7 -6 2 -6 9 9 0 3 -2 1 -2 -5 ...
output:
Yes 0 -2 6 -8 255 -756 3 -85 252 -1 -31 -6 0 -1 -18 0 0 -6 No Yes 9 0 37 -392 2 0 8 -84 1 0 0 0 7 1 0 0 -1 0 -8 0 0 7 65 1 0 0 2 -21 0 0 0 -2 No Yes 3 9 2 9 -3 9 0 -3 No Yes 3 3 No No No No No No No No Yes -9 44 560 7 -33 -420 0 2 28 -1 -20 43 0 -4 98 0 0 -7 No No No No No No No No Yes 3 1 0 1 3 3 0...
result:
ok OK, Accepted. (10000 test cases)
Test #9:
score: 0
Accepted
time: 29ms
memory: 3724kb
input:
10000 3 9 -3 0 0 10 0 0 -7 10 4 -2 -5 -8 5 -1 -1 -9 -3 -3 1 -2 0 -10 1 -8 4 3 8 7 5 0 -10 0 0 2 -5 4 9 -5 -4 -8 0 -4 -9 -9 -9 -4 -10 2 4 9 9 -9 4 2 0 -10 -9 0 0 9 0 -9 0 9 0 10 1 0 5 4 5 -9 3 -1 9 -10 9 -6 1 5 -5 4 -9 -2 -9 10 1 4 4 1 10 -10 0 9 -6 -8 -6 -9 2 2 -4 9 -7 -7 3 4 0 -2 5 0 0 -4 -3 -8 10 ...
output:
Yes 3 0 0 0 -10 30 0 7 -20 3 -1 0 0 -1 30 0 0 10 No Yes 2 1 0 0 -10 10 0 2 -1 4 3 5 0 1 -5 0 0 -5 No No No Yes 2 2 No No No No No No No No No No No No No Yes 0 3 31 -180 1 0 0 0 0 5 62 -360 0 0 -5 30 -10 2 -2 6 0 1 13 6 0 0 -1 -18 0 0 0 -3 No No No Yes 1 0 0 8 -8 10 0 -1 No No No Yes -8 24 3 -8 -1 2...
result:
ok OK, Accepted. (10000 test cases)
Test #10:
score: 0
Accepted
time: 29ms
memory: 3912kb
input:
10000 3 8 -4 -6 -6 10 0 0 1 0 3 -6 3 -9 10 8 -1 -3 -8 0 4 0 0 -1 3 -4 8 -6 5 0 0 9 0 6 0 10 2 1 10 3 9 5 2 0 0 -10 -8 0 9 3 8 1 -9 -10 3 4 -9 3 -9 4 -8 -6 1 -4 -10 0 0 10 4 0 0 0 8 10 0 0 4 0 -5 -10 8 10 -6 -2 -1 -10 -7 -2 -10 -7 -6 -10 -10 4 0 0 -9 -2 -1 -3 4 -6 0 0 0 -3 -9 0 0 9 4 10 7 -8 -5 -10 2...
output:
Yes 4 -28 -6 -3 28 6 0 1 0 2 6 -6 0 1 0 0 0 -3 No No No Yes 9 -2 -1 0 0 10 -8 2 1 1 5 11 0 20 49 0 0 -1 No Yes 4 15 -5 -40 5 15 -5 -40 -2 -6 2 20 -4 -17 6 0 -2 6 -1 14 0 -2 2 32 0 0 5 100 0 0 0 1 No Yes 0 0 9 -7 1 0 0 0 0 0 0 3 9 1 0 0 -1 -3 4 -6 0 27 -36 63 0 0 -1 -1 0 0 0 -1 No Yes 1 0 0 10 -10 10...
result:
ok OK, Accepted. (10000 test cases)