Chief Hopper – HackerRank Solution Java , Python 3, Python 2 , C , C++, Best and Optimal Solutions , All you need.
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C++ Chief Hopper HackerRank Solution
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <limits>
#include <cstring>
#include <string>
using namespace std;
#define pairii pair<int, int>
#define llong long long
#define pb push_back
#define sortall(x) sort((x).begin(), (x).end())
#define INFI numeric_limits<int>::max()
#define INFLL numeric_limits<llong>::max()
#define INFD numeric_limits<double>::max()
#define FOR(i,s,n) for (int (i) = (s); (i) < (n); (i)++)
#define FORZ(i,n) FOR((i),0,(n))
const int MAXN = 100005;
int ar[MAXN];
void solve() {
int n;
scanf("%d",&n);
FORZ(i,n) scanf("%d",ar+i);
int res = 0;
for (int i = n-1; i >= 0; i--) {
int x = res + ar[i];
res = x/2 + x%2;
}
printf("%d",res);
}
int main() {
#ifdef DEBUG
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
#endif
solve();
return 0;
}
Java Chief Hopper HackerRank Solution
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
public class Solution {
private static class InputArray {
final StringTokenizer strt;
public final int length;
InputArray(String str, int N){
strt = new StringTokenizer(str);
length = N;
}
int next(){
return Integer.parseInt(strt.nextToken());
}
}
public static long solve(InputArray array) {
long botEnergy = 0L; // initial bot energy
long power2 = 1L;
final long MAX_LIMIT = 2 << 18;
long b = botEnergy;
for (int i = 0; i < array.length && i < 30; ++i) {
b = 2 * b - array.next();
if(b >= MAX_LIMIT) //after this no amount of input will make energy negative
return botEnergy;
power2 *= 2;
if (b < 0) {
// increase the initial botEnergy by a minimum amount necessary
double dif = -1 * b;
long x = Math.round(Math.floor(dif / power2));
for (long inc = 0; inc <= 10; ++inc) {
long newb = power2 * (x + inc) + b;
if (newb >= 0) {
botEnergy += (x + inc);
b = newb;
break;
}
}
}
}
for (int i = 30; i < array.length; ++i) {
b = 2 * b - array.next();
if (b < 0) {
botEnergy++; // after this increase bot energy can never become
// smaller than 0
break;
}
}
return botEnergy;
}
public static void main(String[] args) throws NumberFormatException, IOException {
BufferedReader bfr = new BufferedReader(new InputStreamReader(System.in));
final int N = Integer.parseInt(bfr.readLine());
InputArray array = new InputArray(bfr.readLine(), N);
System.out.println(solve(array));
}
}
Python 3 Chief Hopper HackerRank Solution
N = int(input())
H = [int(_) for _ in input().split()]
i,b = len(H),H[-1]
while i > 0 :
i -= 1
b = (H[i]+b+1)//2
# print(b)
print(b)
Python 2 Chief Hopper HackerRank Solution
from math import ceil
def validate(val):
global n, h
for i in xrange(n):
val = ((val * 2) - h[i])
if val < 0:
return False
return True
if __name__ == "__main__":
n = int(raw_input())
h = map(int, raw_input().split())
i = 0
mx = max(h)
result = mx + 1
start = 0
while start >= 0 and start <= mx:
mid = ceil((start+mx)/2.0)
if validate(mid):
mx = mid
if mid < result:
result = mid
else:
break
else:
start = mid
print int(result)
C Chief Hopper HackerRank Solution
#include <stdio.h>
#include <stdlib.h>
int main() {
int n, *h, i;
unsigned long long tot;
scanf("%d",&n);
h = malloc(n * sizeof(int));
for (i=0; i<n; i++) scanf("%d",&h[i]);
tot = 0;
i--;
while (i>=0) {
tot += h[i];
if (tot & 1) tot++;
tot /= 2;
i--;
}
printf("%lld\n",tot);
return 0;
}
Warmup
Implementation
Strings
Sorting
Search
Graph Theory
Greedy
Dynamic Programming
Constructive Algorithms
Bit Manipulation
Recursion
Game Theory
NP Complete
Debugging
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