Init

ACMOJ-1948.cpp

@@ -0,0 +1,36 @@
+#include<iostream>
+#include<cstring>
+#include<algorithm>
+#include<cassert>
+#include<string>
+using namespace std;
+typedef long long LL;
+const int inf=0x3f3f3f3f;
+const int maxn=200005;
+char s[maxn];
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+	// freopen("pro.out","w",stdout);
+#endif
+	int T,n; scanf("%d",&T);
+	while(T-->0)
+	{
+		scanf("%s",s); n=strlen(s);
+		int pos[4];
+		pos[1]=pos[2]=pos[3]=-1;
+		int res=inf;
+		for(int i=0;i<n;i++)
+		{
+			int loc=inf;
+			for(int j=1;j<=3;j++)
+				if(j!=s[i]-'0')
+					loc=min(loc,pos[j]);
+			pos[s[i]-'0']=i;
+			if(loc>=0) res=min(res,i-loc+1);
+		}
+		printf("%d\n",res==inf?0:res);
+	}
+	return 0;
+}