new files

Task/Balanced-brackets/C/balanced-brackets-1.c

@@ -0,0 +1,43 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+
+int isBal(const char*s,int l){
+    signed c=0;
+    while(l--)
+	if(s[l]==']') ++c;
+	else if(s[l]=='[') if(--c<0) break;
+    return !c;
+}
+
+void shuffle(char*s,int h){
+    int x,t,i=h;
+    while(i--){
+	t=s[x=rand()%h];
+	s[x]=s[i];
+	s[i]=t;
+    }
+}
+
+void genSeq(char*s,int n){
+    if(n){
+	memset(s,'[',n);
+	memset(s+n,']',n);
+	shuffle(s,n*2);
+    }
+    s[n*2]=0;
+}
+
+void doSeq(int n){
+    char s[64];
+    const char *o="False";
+    genSeq(s,n);
+    if(isBal(s,n*2)) o="True";
+    printf("'%s': %s\n",s,o);
+}
+
+int main(){
+    int n=0;
+    while(n<9) doSeq(n++);
+    return 0;
+}

Task/Balanced-brackets/C/balanced-brackets-2.c

@@ -0,0 +1,9 @@
+'': True
+'[]': True
+']][[': False
+'[][][]': True
+'[]][[]][': False
+'[]][[[[]]]': False
+']]]][[[]][[[': False
+']]]]]][][[[[[[': False
+'[][]][[][[[]]][]': False