'commit'

TangDou/AcWing/Qmi/875_Gui.cpp

@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define int long long
+// 龟速乘
+int gui(int a, int b, int p) {
+    int res = 0;
+    while (b) {
+        if (b & 1) res = (res + a) % p;
+        a = (a + a) % p;
+        b >>= 1;
+    }
+    return res;
+}
+
+int main() {
+    int a, b, p;
+    cin >> a >> b >> p;
+    printf("%lld\n", gui(a, b, p));
+    return 0;
+}