1 files changed, 35 insertions, 0 deletions
diff --git a/contests/Round#809/A/main.cpp b/contests/Round#809/A/main.cpp
new file mode 100644
index 0000000..9f5e962
--- /dev/null
+++ b/contests/Round#809/A/main.cpp
@@ -0,0 +1,35 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int tt;
+	cin >> tt;
+	while(tt--){
+    int n, m;
+    cin >> n >> m;
+    vector<char> v(m, 'B');
+    vector<int> a(n);
+    set<int> vis;
+    for(int &x : a) cin >> x;
+    for(int i = 0; i < n; i++) {
+      int f = a[i] - 1;
+      int l = m - a[i];
+      if(f <= l && v[f] != 'A') {
+        v[f] = 'A';
+      } else if(f <= l && v[f] == 'A') {
+        v[l] = 'A';
+      } else if(l <= f && v[l] != 'A') {
+        v[l] = 'A';
+      } else if(l <= f && v[l] == 'A') {
+        v[f] = 'A';
+      }
+    }
+    for(auto ch : v) {
+      cout << ch;
+    }
+    cout << endl;
+	}
+}