Add 374 in c language

c/374-guess-number-higher-or-lower.c

@@ -0,0 +1,21 @@
+/*
+I pick a number from 1 to n. You have to guess which number I picked.
+
+Space: O(1)
+Time: O(log(n))
+*/
+
+long guess_bis(long min, long max){
+ long m = (max+min)/2;
+ int tmp = guess(m);
+ if (tmp==0)
+ return m;
+ else if (tmp<0)
+ return guess_bis(min,m-1);
+ else
+ return guess_bis(m+1,max); 
+}
+
+long guessNumber(long n){
+ return guess_bis(0,n);
+}