Contest of C++ OOPs Complete Interview Preparation With Doubt Assistance

Cost of String: 

#include<iostream>
using namespace std;
int main()
 {
	int t;
	cin>>t;
	for(int j=0;j<t;j++){
	    string str;
	    cin>>str;
	    int c=0;
	    for(int i=0;i<str.length();i++){
	        if(str[i]=='a' || str[i]=='e' || str[i]=='i' || str[i]=='o' || str[i]=='u' || str[i]=='A' || str[i]=='E' || str[i]=='I' || str[i]=='O' || str[i]=='U')
	            c+=1;
	       else if((str[i]>=65 && str[i]<=91) || (str[i]>=97 && str[i]<=123))
	            c+=2;
	       else
	            c+=3;
	    }
	    cout<<c<<endl;
	    
	}
	return 0;
}


Check MatrixSum:

#include<iostream>
using namespace std;
int main()
 {
	int t;
	cin>>t;
	for(int s=0;s<t;s++){
	    int n, m;
	    cin>>n>>m;
	    int mat[n][m];
	    for(int i=0;i<n;i++){
	        for(int j=0;j<m;j++){
	            cin>>mat[i][j];
	        }
	    }
	    int i=0;
	    int j=n-1;
	    int f=1;
	    while(i<j){
	        int sum1=0, sum2=0;
	        for(int k=0;k<m;k++){
	            sum1=sum1+mat[i][k];
	            sum2=sum2+mat[j][k];
	        }
	        if(sum1!=sum2){
	            f=0;
	            break;
	        }
	        i++;
	        j--;
	    }
	    if(f)
	        cout<<"YES\n";
	   else
	        cout<<"NO\n";
	}
	return 0;
}