Create 19-Hiccup.cpp

Author: tmwilliamlin168

FunctionCup/19-Hiccup.cpp

@@ -0,0 +1,41 @@
+#include "hiccup.h"
+#include <bits/stdc++.h>
+using namespace std;
+
+int a[1000000], lb=0, rb=1000000, mb;
+
+bool chk(string &s, int l, int r, int b=0) {
+	if(l>r)
+		return 1;
+	for(; s[r]=='!'; --r, ++b);
+	return b<mb?0:chk(s, a[r]+1, r-1)&&chk(s, l, a[r]-1, b-mb);
+}
+
+int HicCup(string s) {
+	int n=s.size();
+	if(s[0]=='!')
+		return -1;
+	for(int i=0; i+1<n; ++i)
+		if(s[i]=='H'&&s[i+1]=='!')
+			return -1;
+	vector<int> t;
+	for(int i=0; i<n; ++i) {
+		if(s[i]=='C') {
+			if(t.empty())
+				return -1;
+			a[i]=t.back();
+			t.pop_back();
+		} else if(s[i]=='H')
+			t.push_back(i);
+	}
+	if(t.size())
+		return -1;
+	while(lb<rb) {
+		mb=(lb+rb+1)/2;
+		if(chk(s, 0, n-1))
+			lb=mb;
+		else
+			rb=mb-1;
+	}
+	return lb;
+}