Add problem from CF

Author: jhonber

codeforces/Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined)/C.cpp

@@ -0,0 +1,21 @@
+// http://codeforces.com/contest/765/problem/C
+
+#include<bits/stdc++.h>
+using namespace std;
+
+#define endl '\n'
+#define D(x) cout << #x << " = " << (x) << endl;
+
+int main() {
+  int k, a, b;
+  cin >> k >> a >> b;
+
+  int aa = a / k;
+  int bb = b / k;
+
+  int ans = (a / k) + (b / k);
+  if (a % k != 0 && !bb || b % k != 0 && !aa) cout << -1 << endl;
+  else cout << ans << endl;
+
+  return 0;
+}

codeforces/data.db

@@ -934,4 +934,5 @@
 24577407
 24578991
 24681844
-24682004
+24682004
+24699903