Regarding the error

#1

what is the error ???

#2

Hey @gargshivam2001
Your mintie function looks wrong, I rewrote it with comments

bool mintie(int a[], int m,int p,int key) {
	int  silver=0 ; //total pratas count
	for (int i = 0; i < m; i++) {
		int x = 1;  
		while ( (x * (x + 1)*a[i]) <= 2*key )  //Here pratas are made in arr[i] ,2arr[i] ,3arr[i] .... summation = x*(x+1)/2*a[i] so we are doing that here to find max x which satisfy that
			x++;
		x--;
	    silver += x ; //adding pratas by current chef to total answer
	}
	return (silver>=p);
}

Also to calculate end

int end=0; //updated
        int k=1; //added
        for(int i=1;i<=p;i++){//added
            end+=k*a[m-1]; ..max rank chef makes all the paratas
            ++k;
        }