'commit'

TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202401/hags.cpp

@@ -1,10 +1,30 @@
 #include <bits/stdc++.h>
 using namespace std;
+
+bool check(int x) {
+    int len = to_string(x).size();
+
+    int sum = 0, t = x;
+    while (t) {
+        int a = t % 10;
+        sum += pow(a, len);
+        t /= 10;
+    }
+    
+    return x == sum;
+}
+
 int main() {
-    string a = "abcdefg";
+    int T;
+    cin >> T;//times
+    while (T--) {
+        int a;
+        cin >> a;
 
-    cout << a.substr(1, 1) << endl; // a[1]
-    cout << a.substr(1, 3) << endl; // a[1] a[2] a[3]
-    cout << a.substr(0, 4) << endl;
+        if (check(a))
+            cout << 'T' << endl;
+        else
+            cout << 'F' << endl;
+    }
     return 0;
 }

TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202401/str.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+using namespace std;
+int cnt;
+bool check(int x) {
+    string s = to_string(x);
+    string t = s;
+    reverse(t.begin(), t.end());
+
+    if (s != t) return false;
+    bool flag = false;
+    for (int i = 0; i < s.size(); i++)
+        if (s[i] == '7') flag = true;
+    if (!flag) return false;
+    return true;
+}
+int main() {
+    int a, b;
+    cin >> a >> b;
+    for (int i = a; i <= b; i++)
+        if (check(i)) cnt++;
+    cout << cnt << endl;
+    return 0;
+}