Commit f34fc142 authored by ryze's avatar ryze Committed by Xeonacid
Browse files

may be an error (#1168) 

should visit if the additive inverse of a[i] exist???
parent 9433dba6

docs/basic/enumerate.md

+1 −1
Original line number Diff line number Diff line
@@ -55,7 +55,7 @@ bool met[MAXN * 2]; 
// 初始化 met 数组为 0；

memset(met, 0, sizeof(met));

for (int i = 0; i < n; ++i) {

  if (met[a[i] + MAXN]) ++ans;

  if (met[MAXN - a[i]]) ++ans;

  // 为了避免负数下标

  met[a[i] + MAXN] = 1;

}