/in/foo.cc: In function 'int main()':
/in/foo.cc:16:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     else if(a[i]=='['&&a[j]==']'||a[j]=='['&&a[i]==']'){
                      ^
/in/foo.cc:20:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     else if(a[i]=='{'&&a[j]=='}'||a[j]=='{'&&a[i]=='}'){
                      ^