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;