feat(cf): update with 957.f

codeforces/1003/b.cc

@@ -68,22 +68,12 @@ using vec = std::vector<T>;
 void solve() {
   string s;
   cin >> s;
-  vec<char> S;
-  for (auto e : s) {
-    if (!S.empty() && S.back() == e) {
-      S.pop_back();
-      S.push_back('*');
-    } else
-      S.push_back(e);
+  bool can = false;
+  for (int i = 1; i < sz<int>(s); ++i) {
+    if (s[i] == s[i - 1])
+      can = true;
   }
-
-  while (sz<int>(S) >= 2) {
-    if (S.back() == '*' || S[sz<int>(S) - 1] == '*')
-      S.pop_back();
-    else
-      break;
-  }
-  prln("{}", sz<int>(S));
+  prln("{}", can ? 1 : sz<int>(s));
 }
 
 // {{{

codeforces/1003/b.out

@@ -4,4 +4,4 @@
 4
 
 [code]: 0
-[time]: 11.9956 ms
+[time]: 12.0482 ms

codeforces/1003/f.out

@@ -4,4 +4,4 @@
 1001001000100
 
 [code]: 0
-[time]: 3.66259 ms
+[time]: 4.07124 ms