P1198 [JSOI2008]最大数

R42912514

problem/P1198/P1198.cpp

@@ -0,0 +1,40 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+long long t, d, a[200005], f[200005][25];
+int n, m, x;
+char op;
+bool flag;
+
+void change(int u) {
+    f[u][0] = a[u];
+    for (int i = 1; u - (1 << i) >= 0; i++) {
+        f[u][i] = max(f[u][i - 1], f[u - (1 << (i - 1))][i - 1]);
+    }
+}
+
+long long find(int x, int y) {
+    int d = (int)(log(y - x + 1) / log(2));
+    return max(f[y][d], f[x + (1 << d) - 1][d]);
+}
+
+int main() {
+    cin >> m >> d;
+    while (m--) {
+        cin >> op >> x;
+        if (op == 'A') {
+            a[++n] = (x + t) % d;
+            change(n);
+        }
+        else if (op == 'Q') {
+            if (x == 1) {
+                cout << (t = a[n]) << endl;
+            }
+            else {
+                cout << (t = find(n - x + 1, n)) << endl;
+            }
+        }
+    }
+    return 0;
+}