8 files changed, 60 insertions, 0 deletions
diff --git a/codeforces/BuyAShovel/main b/codeforces/BuyAShovel/main
new file mode 100755
index 0000000..84997a5
--- /dev/null
+++ b/codeforces/BuyAShovel/main
diff --git a/codeforces/BuyAShovel/main.cpp b/codeforces/BuyAShovel/main.cpp
new file mode 100644
index 0000000..a486a92
--- /dev/null
+++ b/codeforces/BuyAShovel/main.cpp
@@ -0,0 +1,54 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+using ll = long long;
+using pi = pair<int, int>;
+using vpi = vector<pi>;
+using vi = vector<int>;
+using vll = vector<long long>;
+using mpii = map<int, int>;
+using mpll = map<ll, ll>;
+using db = long double;
+
+#define push_back pb
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define lb lower_bound
+#define ub upper_bound
+
+const int MOD = (int)1e9 + 7;
+const db PI = acos((db)-1);
+const int dx[4]{1, 0, -1, 0};
+const int dy[4]{0, 1, 0, -1};
+
+void solve() {
+  int k, r;
+  cin >> k >> r;
+  int cnt = 1;
+  int i = 2;
+  int x = k;
+  while (x % 10 != r && x % 10 != 0) {
+    cerr << x << '\n';
+    x = k * i;
+    cnt++;
+    i++;
+  }
+  cout << cnt << '\n';
+
+}
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+  solve();
+}
+
+/* stuff you should look for:
+  ---------------------------
+   * special cases (n=1?)
+   * int overflow, array bounds
+   * do smth instead of nothing and stay organized
+   * WRITE STUFF DOWN
+   * DON'T GET STUCK ON ONE APPROACH
+ */
diff --git a/codeforces/BuyAShovel/main_input0.txt b/codeforces/BuyAShovel/main_input0.txt
new file mode 100644
index 0000000..77d5b11
--- /dev/null
+++ b/codeforces/BuyAShovel/main_input0.txt
@@ -0,0 +1 @@
+117 3
diff --git a/codeforces/BuyAShovel/main_input1.txt b/codeforces/BuyAShovel/main_input1.txt
new file mode 100644
index 0000000..70a833f
--- /dev/null
+++ b/codeforces/BuyAShovel/main_input1.txt
@@ -0,0 +1 @@
+237 7
diff --git a/codeforces/BuyAShovel/main_input2.txt b/codeforces/BuyAShovel/main_input2.txt
new file mode 100644
index 0000000..4955335
--- /dev/null
+++ b/codeforces/BuyAShovel/main_input2.txt
@@ -0,0 +1 @@
+15 2
diff --git a/codeforces/BuyAShovel/main_output0.txt b/codeforces/BuyAShovel/main_output0.txt
new file mode 100644
index 0000000..ec63514
--- /dev/null
+++ b/codeforces/BuyAShovel/main_output0.txt
@@ -0,0 +1 @@
+9
diff --git a/codeforces/BuyAShovel/main_output1.txt b/codeforces/BuyAShovel/main_output1.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/codeforces/BuyAShovel/main_output1.txt
@@ -0,0 +1 @@
+1
diff --git a/codeforces/BuyAShovel/main_output2.txt b/codeforces/BuyAShovel/main_output2.txt
new file mode 100644
index 0000000..0cfbf08
--- /dev/null
+++ b/codeforces/BuyAShovel/main_output2.txt
@@ -0,0 +1 @@
+2