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Matrix exponentiatiion.cpp
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83 lines (83 loc) · 1.1 KB
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#include<bits/stdc++.h>
using namespace std;
#define N 101
int ar[N][N],I[N][N];
void mul(int A[][N], int B[][N], int dim)
{
int res[dim+1][dim+1];
for(int i=1;i<=dim;i++)
{
for(int j=1;j<=dim;j++)
{
res[i][j]=0;
for(int k=1;k<=dim;k++)
{
res[i][j] += A[i][k]*B[k][j];
}
}
}
for(int i=1;i<=dim;i++)
{
for(int j=1;j<=dim;j++)
{
A[i][j] = res[i][j];
}
}
}
void power(int A[][N], int dim, int n)
{
for(int i=1;i<=dim;i++)
{
for(int j=1;j<=dim;j++)
{
if(i==j)
{
I[i][j]=1;
}
else
{
I[i][j]=0;
}
}
}
for(int i=1;i<=n;i++)
{
mul(I,A,dim);
}
for(int i=1;i<=dim;i++)
{
for(int j=1;j<=dim;j++)
{
A[i][j] = I[i][j];
}
}
}
void printMat(int A[][N], int dim)
{
for(int i=1;i<=dim;i++)
{
for(int j=1;j<=dim;j++)
{
cout<<A[i][j]<<" ";
}
cout<<endl;
}
}
int main()
{
int t,dim,n;
cin>>t;
while(t--)
{
cin>>dim>>n;
for(int i=1;i<=dim;i++)
{
for(int j=1;j<=dim;j++)
{
cin>>ar[i][j];
}
}
power(ar,dim,n);
printMat(ar,dim);
}
}