foo.cc: In function ‘int main()’:
foo.cc:7:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
    7 |         if(a>=60&&b<60||b>=60&&a<60)
      |            ~~~~~^~~~~~
foo.cc:8:21: warning: ‘flag’ may be used uninitialized [-Wmaybe-uninitialized]
    8 |                 flag++;
      |                 ~~~~^~
foo.cc:5:17: note: ‘flag’ was declared here
    5 |         int a,b,flag;
      |                 ^~~~