update gitignore. update compile.sh

contests/5contest/1.cpp

@@ -2,20 +2,18 @@
 #include <vector>
 #include <algorithm>
 
-bool comp(unsigned int a, unsigned int b) {
+int cnt_bit(unsigned int a) {
     int res1 = 0;
     while (a != 0) {
         res1 += a & 1;
         a = a >> 1;
     }
 
-    int res2 = 0;
-    while (b != 0) {
-        res2 += b & 1;
-        b = b >> 1;
-    }
+    return res1;
+}
 
-    return res1 < res2;
+bool comp(unsigned int a, unsigned int b) {
+    return cnt_bit(a) < cnt_bit(b);
 }