diff --git a/src/7/13/U82726.cpp b/src/7/13/U82726.cpp
new file mode 100644
index 0000000..be90f3a
--- /dev/null
+++ b/src/7/13/U82726.cpp
@@ -0,0 +1,25 @@
+#include <cstdint>
+#include <cstdio>
+#include <iostream>
+
+using ll = int64_t;
+
+bool is_num(char c){
+    return '0'<=c&&c<='9';
+}
+
+ll get_num(){
+    char c;
+    do {
+        c=getchar();
+    }while (!is_num(c));
+    ll n=c-'0';
+    while (is_num(c=getchar())) {
+        n=n*10+c-'0';
+    }
+    return n;
+}
+
+int main(){
+    
+}
\ No newline at end of file