A - Computer Game

https://codeforces.com/contest/1598/submission/131422144

CodeForces/1598/A/A.cpp

@@ -0,0 +1,25 @@
+#pragma GCC optimize("Ofast")
+
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int t, n;
+string s[2];
+bool flag;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin >> t;
+    while (t--) {
+        flag = true;
+        cin >> n >> s[0] >> s[1];
+        for (int i = 0; i < n; i++) {
+            if (s[0][i] == '1' && s[1][i] == '1') {
+                flag = false;
+            }
+        }
+        cout << (flag ? "YES" : "NO") << endl;
+    }
+    return 0;
+}