'commit'

TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202401/6_dfs.cpp

@@ -14,7 +14,9 @@ void dfs(string s) {
     int p;
     for (p = s.size() - 1; p; p--)
         if (s[0] != s[p]) break;
-    string t = s.substr(1, p);
+
+    string t;
+    for (int i = 1; i <= p; i++) t += s[i];
     if (t.size()) cnt++, dfs(t);
 }
 

TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202401/hags.cpp

@@ -1,41 +1,10 @@
 #include <bits/stdc++.h>
 using namespace std;
-const int N = 10010;
-int a[N];
-int sum, avg, total;
 int main() {
-    int n;
-    cin >> n;
-    for (int i = 1; i <= n; i++) {
-        cin >> a[i];
-        sum += a[i];
-    }
-    if (sum % n) {
-        cout << -1 << endl;
-        exit(0);
-    }
-    avg = sum / n;
+    string a = "abcdefg";
 
-    for (int i = 1; i <= n; i++) {
-        int d = a[i] - avg;
-        total += abs(d);
-        for (int j = 1 + i; j <= n; j++) {
-            if (d > 0 && a[j] < avg) {
-                int x = min(d, avg - a[j]);
-                a[i] -= x;
-                a[j] += x;
-                d -= x;
-            }
-
-            if (d < 0 && a[j] > avg) {
-                int x = min(d,  a[j]-avg);
-                a[i] += x;
-                a[j] -= x;
-                d += x;
-            }
-            if (d == 0) break;
-        }
-    }
-    cout << total << endl;
+    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;
     return 0;
 }