Sudoku check

#include <fstream>
using namespace std;

    ifstream inFile("data.txt");
    ofstream outFile("results.txt");
    int n, sudoku[10][10], sumH[20], sumV[20];
    bool bSum=false, bSkirt=false;

void input(){
    inFile >> n;

    for(int i=0;i<n;i++){
        for(int m=0;m<n;m++){
            inFile >> sudoku[i][m];
        }
    }
    inFile.close();
}
void sum(){
    for(int i=0;i<n;i++){
        sumH[i]=0;
        sumV[i]=0;
        for(int m=0;m<n;m++){
            sumH[i]+=sudoku[i][m];
            sumV[i]+=sudoku[m][i];
        }
    }

    for(int i=0;i<n;i++){
        for(int m=0;m<n;m++){
            if(sumH[i]==sumH[m] && sumV[i]==sumH[m]){
                bSum = true;
            }else{
                bSum = false;
                break;

            }
        }
    }
}
void difference(){
    for(int i=0;i<n;i++){
        for(int m=1;m<n;m++){
            if(sudoku[0][i]!=sudoku[m][i] && sudoku[i][0]!=sudoku[i][m]){
                bSkirt = true;
            }else{
                bSkirt = false;
                break;
            }
        }
    }
}

int main(){

    input();
    sum();
    difference();

    if(bSum&&bSkirt){
        outFile << "It is valid!";
    }else{
        outFile << "It is not!";
    }

    outFile.close();
    return 0;
}