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- #include <iostream>
- using namespace std;
- int r,c;
- char m[15][15];
- int dfs(int x, int y)
- {
- if(x==r-1 && y==c-1)
- return 1;
- int rezultat=0;
- for(int j=x+1;j<r;j++)
- for(int k=y+1;k<c;k++)
- if(m[x][y]!=m[j][k])
- rezultat+=dfs(j,k);
- return rezultat;
- }
- int main()
- {
- cin>>r>>c;
- for(int i=0;i<r;i++)
- for(int j=0;j<c;j++)
- cin>>m[i][j];
- cout<<dfs(0,0);
- return 0;
- }
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