delete pics to save space

5.1204A.cpp

@@ -0,0 +1,19 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+char s[105]; int n;
+int main()
+{
+	#ifdef local
+	freopen("pro.in","r",stdin);
+	#endif
+	scanf("%s",s); n=strlen(s);
+	if(n==1&&(s[0]=='0'||s[0]=='1')) { puts("0"); return 0; }
+	int res=0;
+	res+=n/2;
+	if((n-1)%2==0)
+		for(int i=1;i<n;i++) if(s[i]=='1') { res++; break; }
+	printf("%d\n",res);
+	return 0;
+}