update

src/P2822/P2822_prefix.cpp

@@ -1,5 +1,7 @@
+#include <cctype>
 #include <iostream>
 #include <algorithm>
+#include <type_traits>
 
 using ull = unsigned long long;
 
@@ -24,14 +26,38 @@ static void init(){
 
 #define NV(v)#v<<" : "<<(v)
 
+template<class T>
+struct ReadNumber{
+    ReadNumber& operator>>(T &num){
+        c=0,w=1,n=0;
+        while(!isdigit(c)){
+            if constexpr (!std::is_unsigned_v<T>){
+                if(c=='-')w=-1;
+            }
+            c=getchar();
+        }
+        while(isdigit(c)){
+            n=n*10+(c-'0');
+            c=getchar();
+        }
+        num = w*n;
+        return *this;
+    }
+private:
+    char c;
+    T w,n;
+};
+
+ReadNumber<ull> readull;
+
 int main(){
-    std::cin>>t>>k;
+    readull>>t>>k;
     // std::cout<<NV(t)<<'\n'<<NV(k)<<'\n';
     init();
     for(ull i {0};i<t;i++){
         // std::cout<<NV(t)<<'\n'<<NV(k)<<'\n';
-        std::cin>>n>>m;
-        std::cout<<"test\n";
+        readull>>n>>m;
+        // std::cout<<"test\n";
         m = std::min(m,n);
         std::cout<<(prefix[n][m])<<'\n';
     }