大括号不换行
int f(int x){
...
}
运算符之间打空格
if(a + b > c && d - e <= f)
逗号后打空格
int a, b, c;
函数缩进4格,for缩进3格,if,else,while,switch缩进2格
int f(x){
for(int i = 1; i <= n; ++i)
if(i % 2 == 0)
while(i % 2 == 0)
i /= 2;
return 233;
}
喜欢用#define
#define lowbit(x) (x & (-x))
#define INF 2147483647
#define ll long long
#define left (now << 1)
#define right (now << 1 | 1)
#define Open(s) freopen(s".in","r",stdin);freopen(s".out","w",stdout);
#define Close fclose(stdin); fclose(stdout);
常量名全大写
const int MAXN = 100010;