Precreation contest files

misc/bdhsg_1015/search.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  freopen("search.inp", "r", stdin);
+
+  int n, x;
+  cin >> n >> x;
+  vector<int> a(n);
+  for (int &i : a)
+    cin >> i;
+
+  if (x - 1 > n || x < 0) {
+    cout << -1 << '\n';
+    return 0;
+  } else {
+    x = a[x - 1];
+  }
+  int cnt = 0;
+  for (int i = 0; i < n; i++) {
+    // cout << a[i] << '\n';
+    if (a[i] == x) {
+      cout << i + 1 << ' ';
+      cnt++;
+    }
+  }
+  cout << '\n';
+  cout << ((cnt == 0) ? -1 : cnt) << '\n';
+}