DSA/bookallocation.cpp at main · sumedhpatil2005/DSA · GitHub

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#include<iostream>
using namespace std;

    bool ispossible(int arr[],int n,int m,int mid){
        int studentcount =1;
        int pagesum = 0;
        for(int i=0;i<n;i++){
            if(pagesum + arr[i]<=mid){
                pagesum+=arr[i];
            }
            else{
                studentcount++;
                if(studentcount>m||arr[i]>mid){
                    return false;
                }
                pagesum = arr[i];
            }


        }
    return true;


    }

int allocateBook(int arr[],int n ,int m ){
    int s = 0;
    int sum = 0;
    for(int i=0;i<n;i++){
        sum  += arr[i];
    }
    int e = sum;
    int ans =-1;
    int mid = s+(e-s)/2;
while(s<e){
    if(ispossible(arr,n,m,mid)){
        ans = mid;
        e = mid-1;

    }
    else{
        s = mid +1;

    }
    mid = s+(e-s)/2;
    }
    return ans;

}


int main(){
    int arr[4] ={10,20,30,40};
    cout<<allocateBook(arr,4,2);
return 0;
}