2 files changed, 125 insertions, 2 deletions
diff --git a/algo/debug.h b/algo/debug.h
new file mode 100644
index 0000000..f7b1a0b
--- /dev/null
+++ b/algo/debug.h
@@ -0,0 +1,123 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+using ll = long long;
+using pii = pair<int, int>;
+using vpii = vector<pii>;
+using vi = vector<int>;
+using vll = vector<long long>;
+using mpii = map<int, int>;
+using mpll = map<ll, ll>;
+using db = long double;
+
+#define pb push_back
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define lb lower_bound
+#define ub upper_bound
+#define make_unique(x)                                                         \
+  sort(all((x)));                                                              \
+  (x).resize(unique(all((x))) - (x).begin())
+#define ceil(a, b) ((a) + (b)-1) / (b)
+
+const int mod = (int)1e9 + 7;
+const db pi = acos((db)-1);
+const int dx[4]{1, 0, -1, 0};
+const int dy[4]{0, 1, 0, -1};
+
+template <typename k, typename v>
+ostream &operator<<(ostream &os, const pair<k, v> &p);
+template <typename t> ostream &operator<<(ostream &os, const vector<t> &vec);
+template <typename k, typename v>
+ostream &operator<<(ostream &os, const map<k, v> &m);
+template <typename k, typename v>
+ostream &operator<<(ostream &os, const unordered_map<k, v> &m);
+template <typename t> ostream &operator<<(ostream &os, const set<t> &s);
+template <typename t>
+ostream &operator<<(ostream &os, const unordered_set<t> &s);
+
+template <typename k, typename v>
+ostream &operator<<(ostream &os, const pair<k, v> &p) {
+  os << "(" << p.first << ", " << p.second << ")";
+  return os;
+}
+
+template <typename t> ostream &operator<<(ostream &os, const vector<t> &vec) {
+  os << "[";
+  for (size_t i = 0; i < vec.size(); ++i) {
+    if (i > 0)
+      os << ", ";
+    os << vec[i];
+  }
+  os << "]";
+  return os;
+}
+
+template <typename t>
+ostream &operator<<(ostream &os, const vector<vector<t>> &vec) {
+  os << "[\n";
+  for (size_t i = 0; i < vec.size(); ++i) {
+    os << "  " << vec[i];
+    if (i > 0)
+      os << ", ";
+    os << '\n';
+  }
+  os << "]";
+  return os;
+}
+
+template <typename k, typename v>
+ostream &operator<<(ostream &os, const map<k, v> &m) {
+  os << "{";
+  for (const auto &p : m) {
+    os << p.first << ": " << p.second << ", ";
+  }
+  os << "}";
+  return os;
+}
+
+template <typename k, typename v>
+ostream &operator<<(ostream &os, const unordered_map<k, v> &m) {
+  os << "{";
+  for (const auto &p : m) {
+    os << p.first << ": " << p.second << ", ";
+  }
+  os << "}";
+  return os;
+}
+
+template <typename t> ostream &operator<<(ostream &os, const set<t> &s) {
+  int i = 0;
+  os << "{";
+  for (const auto &e : s) {
+    if (i > 0)
+      os << ", ";
+    os << e;
+    i++;
+  }
+  os << "}";
+  return os;
+}
+
+template <typename t>
+ostream &operator<<(ostream &os, const unordered_set<t> &s) {
+  int i = 0;
+  os << "{";
+  for (const auto &e : s) {
+    if (i > 0)
+      os << ", ";
+    os << e;
+    i++;
+  }
+  os << "}";
+  return os;
+}
+
+void debug_out() { cerr << endl; }
+
+template <typename head, typename... tail> void debug_out(head h, tail... t) {
+  cerr << h << '\n';
+  debug_out(t...);
+}
+
+#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):\n", debug_out(__VA_ARGS__)
diff --git a/contests/Round900/B/main.cpp b/contests/Round900/B/main.cpp
index 3484ecd..a77ceb3 100755
--- a/contests/Round900/B/main.cpp
+++ b/contests/Round900/B/main.cpp
@@ -120,9 +120,9 @@ void solve() {
   int n;
   cin >> n;
   vi v(n);
-  v[0] = 3;
+  v[0] = 5;
   for (int i = 1; i < n; i++) {
-    v[i] = v[i - 1] + 7;
+    v[i] = v[i - 1] + 1;
   }
   for (int i = 0; i < n; i++) {
     cout << v[i] << ' ';