new file: P2114.cpp

P2114.cpp

@@ -0,0 +1,43 @@
+// 998
+#include <bits/stdc++.h>
+using namespace std;
+int n, m, ans, t[100005], op[100005];
+char str[4];
+bool calc(bool x, int j)
+{
+    for (int i = 0; i < n; i++)
+        if (op[i] == 1)
+            x |= t[i] >> j & 1;
+        else if (op[i] == 2)
+            x ^= t[i] >> j & 1;
+        else
+            x &= t[i] >> j & 1;
+    return x;
+}
+int main()
+{
+    scanf("%d %d", &n, &m);
+    for (int i = 0; i < n; i++)
+    {
+        scanf("\n%s %d", str, t + i);
+        if (str[0] == 'O')
+            op[i] = 1;
+        else if (str[0] == 'X')
+            op[i] = 2;
+        else
+            op[i] = 3;
+    }
+    for (int i = 29; ~i; i--)
+        if (1 << i <= m)
+        {
+            bool x = calc(0, i), y = calc(1, i);
+            if (x >= y)
+                ans |= x << i;
+            else
+                ans |= y << i, m -= 1 << i;
+        }
+        else
+            ans |= calc(0, i) << i;
+    printf("%d\n", ans);
+    return 0;
+}