This is my CPP solution.
class Solution {
public:
int oddCells(int m, int n, vector<vector<int>>& indices) {
int sum = 0, k = indices.size(); int oR= 0, oC = 0, eR=0, eC = 0;
vector<int> row(m+1,0);
vector<int> col(n+1,0);
for(int i=0;i<k;i++){
row[indices[i][0]]++;
col[indices[i][1]]++;
}
for(int i=0;i<m;i++){
if(row[i]%2 == 1)
oR += 1;
else
eR += 1;
}
for(int i=0;i<n;i++){
if(col[i]%2 == 1)
oC += 1;
else
eC += 1;
}
sum += (oR * n);
cout << sum << endl;
if(oC){
sum -= (oR*oC);
cout << sum << endl;
sum += (oC*eR);
}
return sum;
}
};