/in/foo.c: In function 'main':
/in/foo.c:19:21: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if (i1 % 2 == 0 && same == i2/2 ||i1 % 2 != 0 && same == (i2 - 1) / 2){
         ~~~~~~~~~~~~^~~~~~~~~~~~~~~