Set up a git repoHEADmaster

1 files changed, 49 insertions, 0 deletions

diff --git a/tests/sysy_lvX/081_n_queens.sy b/tests/sysy_lvX/081_n_queens.sy
new file mode 100644
index 0000000..5a5c086
--- /dev/null
+++ b/tests/sysy_lvX/081_n_queens.sy
@@ -0,0 +1,49 @@
+int ans[50], sum = 0, n;
+
+int row[50], line1[50], line2[100];
+
+void printans()
+{
+    sum = sum + 1;
+    int i = 1;
+    while (i <= n) {
+        putint(ans[i]);
+        if (i == n) {
+            putch(10);
+            return;
+        } else
+            putch(32);
+        i = i + 1;
+    }
+}
+
+void f(int step)
+{
+    int i = 1;
+    while (i <= n) {
+        if (row[i] != 1 && line1[step + i] == 0 && !line2[n + step - i]) {
+            ans[step] = i;
+            if (step == n)
+                printans();
+            row[i] = 1;
+            line1[step + i] = 1;
+            line2[n + step - i] = 1;
+            f(step + 1);
+            row[i] = 0;
+            line1[step + i] = 0;
+            line2[n + step - i] = 0;
+        }
+        i = i + 1;
+    }
+}
+
+int main()
+{
+    int N = getint();
+    while (N > 0) {
+        n = getint();
+        f(1);
+        N = N - 1;
+    }
+    return sum;
+}