k, a, b = [int(x) for x in input().split()]
score_a = 0
if a >= k:
score_a = a // k
score_b = 0
if b >= k:
score_b = b // k
if score_a == 0 and score_b == 0:
print(-1)
elif score_a == 0:
if b % k == 0:
print(score_b)
else:
print(-1)
elif score_b == 0:
if a % k == 0:
print(score_a)
else:
print(-1)
else:
print(score_a + score_b)#include <bits/stdc++.h>
#define Mo7amed_Alaa ios::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define ll long long
using namespace std;
int main()
{
Mo7amed_Alaa
ll k,a,b;
cin >> k >> a >> b;
ll ans = (a/k)+(b/k);
if ((a<k&&(b%k != 0))||(b<k&&(a%k != 0))) cout << -1;
else cout << ans;
return 0;
} 1505A - Is it rated - 2 | 169A - Chores |
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1005B - Delete from the Left | 94A - Restoring Password |
1529B - Sifid and Strange Subsequences | 1455C - Ping-pong |
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