Problem:
Score : 100 points

Problem Statement

Serval is fighting with a monster.

The health of the monster is H.

In one attack, Serval can decrease the monster's health by A.
There is no other way to decrease the monster's health.

Serval wins when the monster's health becomes 0 or below.

Find the number of attacks Serval needs to make before winning.

Constraints

1 \leq H \leq 10^4

1 \leq A \leq 10^4

All values in input are integers.

Input

Input is given from Standard Input in the following format:

H A

Output

Print the number of attacks Serval needs to make before winning.

Sample Input 1

10 4

Sample Output 1

3

After one attack, the monster's health will be 6.

After two attacks, the monster's health will be 2.

After three attacks, the monster's health will be -2.

Thus, Serval needs to make three attacks to win.

Sample Input 2

1 10000

Sample Output 2

1

Sample Input 3

10000 1

Sample Output 3

10000

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
#define lli long long int
#define pb push_back
#define mod2 998244353
#pragma GCC optimize("-O2")
#define mod3 127
#define mod 1000000007
#define MAXN 1000000000
#define v32 vector<int>
#define v64 vector<lli>
#define v1024 vector<vector<int>>
#define v4096 vector<vector<lli>>
#define vt vector
#define f(x, y, z) for (lli x = y; x < z; x++)
#define fd(x, y, z) for (lli x = y; x > z; x--)
#define lb lower_bound
#define ld long double
#define m64 map<lli, lli>
#define m32 map<int, int>
#define m64it map<lli, lli>::iterator
#define m32it map<int, int>::iterator
#define fastio                    \
ios_base::sync_with_stdio(0); \
cin.tie(0);                   \
cout.tie(0)
#define ist insert
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
#define p_q priority_queue
#define min_p_q priority_queue<int, vt<int>, greater<int>>
using namespace std;
using namespace __gnu_pbds;
lli tmod(lli x, lli y)
{
    return (x % y + y) % y;
}
template <typename T>
void DEBUG_ARR(vt<T> a)
{
    f(i, 0, a.size()) cout << a[i] << " ";
    cout << "\n";
}
lli power(lli x, lli y) 
{
    lli res = 1;  
    while (y > 0) 
    { 
        if (y & 1) 
            res = (res*x)%mod; 
        y = y>>1; 
        x = (x*x)%mod;
    }
    if(res<0)res+=mod;
    return res; 
}

int main()
{   
    fastio;
    int h,a;
    cin>>h>>a;
    cout<<(h-1)/a+1<<"\n";
    return 0;
}