➤ Problem Link : DCEPC12E
👉 Hint : edit please
✅ C++ Solution :
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
int main()
{
int n;
ll sum=0;
cin>>n;
ll arr1[n][n],arr2[n][n];
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
cin>>arr1[i][j];
}
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
cin>>arr2[i][j];
}
for(int i=0;i<n;i++)
{
int j,k;
for(j=0;j<n;j++)
{
for(int k=0;k<n;k++)
sum+=arr1[i][k]*arr2[k][j];
}
}
int q,x,y;
ll v,diff;
char c;
cin>>q;
while(q--)
{
cin>>c>>x>>y>>v;
if(c=='A')
{
diff=v-arr1[x][y];
for(int j=0;j<n;j++)
{
sum+=diff*arr2[y][j];
}
arr1[x][y]=v;
}
else
{
diff=v-arr2[x][y];
for(int i=0;i<n;i++)
{
sum+=diff*arr1[i][x];
}
arr2[x][y]=v;
}
cout<<sum<<endl;
}
}
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I am a Member Technical at D.E. Shaw India Pvt. Ltd. CodingWithArt is a blog where you find tricks and solutions to challenging coding and development problems. I aim to build a universal tech platform for every enthusiast out there.