feat(codeforces/937): a-f

codeforces/937/c.cc

@@ -0,0 +1,55 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+using f64 = double;
+using f128 = long double;
+//  }}}
+
+void solve() {
+  string time;
+  cin >> time;
+  u32 hour = stoi(time.substr(0, 2));
+  u32 minute = stoi(time.substr(3, 2));
+
+  bool pm = hour >= 12;
+  if (hour > 12) {
+    hour %= 12;
+  }
+  if (hour == 0) {
+    hour = 12;
+  }
+
+  if (hour < 10) {
+    cout << '0';
+  }
+  cout << hour << ':';
+  if (minute < 10) {
+    cout << '0';
+  }
+  cout << minute << ' ' << (pm ? "PM" : "AM") << '\n';
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+  int tc = 1;
+  cin >> tc;
+
+  for (int t = 0; t < tc; ++t) {
+    solve();
+  }
+
+  return 0;
+}
+// }}}