delete pics to save space

2.673.cpp

@@ -0,0 +1,38 @@
+#include<cstdio>
+#include<cstring>
+#include<stack>
+using namespace std;
+char str[130];
+int len;
+bool chk()
+{
+	stack<char> stk;
+	for(int i=0;i<len-1;i++)
+	{
+		if(str[i]=='('||str[i]=='[') stk.push(str[i]);
+		else
+		{
+			if(stk.empty()) return 0;
+			if((str[i]==')'&&stk.top()!='(')||(str[i]==']'&&stk.top()!='[')) return 0;
+			stk.pop();
+		}
+	}
+	return (stk.size()==0);
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	int n;
+	scanf("%d",&n);
+	fgets(str,130,stdin);
+	for(int i=0;i<n;i++)
+	{
+		fgets(str,130,stdin);
+		len=strlen(str);
+		if(chk()) printf("Yes\n");
+		else printf("No\n"); 
+	}
+	return 0;
+}