Problem: Check the balance of parenthesis sequence, the string contains (),{} and [].
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#include <stdio.h> #include <string.h> int main() { //code char s[105]; char arr[105]; int balance; int t,idx,i; scanf("%d",&t); while(t--) { scanf("%s",s); idx=0; balance=1; for(i=0;i<strlen(s);i++) { if(s[i]=='(' || s[i]=='{' || s[i]=='[') arr[idx++]=s[i]; else if(s[i]==')') { if(arr[idx-1]=='(') { idx--; } else balance=0; } else if(s[i]=='}') { if(arr[idx-1]=='{') { idx--; } else balance=0; } else if(s[i]==']') { if(arr[idx-1]=='[') { idx--; } else balance=0; } if(balance==0) break; } if(balance==0) printf("not balanced\n"); else printf("balanced\n"); } return 0; } |