Koko eating bananas

int totalHrs(int h, vector<int> &v){

    int tot = 0;

    for(int i=0; i<v.size(); i++){

        tot += ceil((double)v[i] / (double)h);
    }

    return tot;
}

int minimumRateToEatBananas(vector<int> v, int h) {
    // Write Your Code Here


    // koko can eat min 1 banana in an hr or max the max value of array in an hr
    int l = 1;
    int r = -1e8;

    for(int i=0; i<v.size(); i++){

        r = max(r, v[i]);
        //r += v[i];
    }


    while(l <= r){

        int mid = (l+r)/2;

        int t = totalHrs(mid, v);

        if(t <= h){

            r = mid-1;
        }

        else l = mid+1;
    }

    return l;
}