ACM代码模板
功能介绍
写了I/O函数，支持以下几种方式
1 read(num); //读入一个数num（任意整数类型，下同） 2 read(num1,num2,num3,num4); //读入任意多个数 3 read(arr,n); //对一个整数数组arr读入n个值，[0,n-1] 4 read(arr,first,last); //对一个整数数组arr读入区间last-first+1个值，[first,last] 5 read(s); //读入一个字符串数组（string和char数组都支持） 6 print(num); //输出一个数num 7 print(num1,num2,num3,num4); //输出任意多个数，中间用空格隔开 8 print(arr,n); //对一个整数数组arr输出n个值，[0,n-1]，中间用空格隔开 9 print(arr,first,last); //对一个整数数组arr输出last-first+1个值，[first,last]，中间用空格隔开
10 //read()有返回值，遇到EOF返回0。多组数据时可以放心使用while(read(n)){} 11 //至于字符串的输出没有进行优化，测试显示直接cout或者printf比较快
关于define nc getchar,是因为用到了fread，本地调试时候请不要注释，否则无法从键盘读入数据，提交时注释这句话即可。
支持以下几个函数
1 gcd(a,b); //求两数gcd（任意整数类型，下同） 2 lowbit(x); //求一个整数的lowbit 3 mishu(x); //判断一个数是不是2的幂 4 q_mul(a,b,p); //求(a*b)%p的值，防止溢出,O(logN) 5 f_mul(a,b,p); //求(a*b)%p的值，防止溢出,O(1),可能丢失精度 6 q_pow(a,b,p); //求(a^b)%p的值，不防溢出，O(logN) 7 s_pow(a,b,p); //求(a^b)%p的值，防溢出，O(logN*logN) 8 ex_gcd(a,b,x,y); //扩展GCD 9 com(m,n); //求C(m,n) 10 isprime(num); //判断一个数是否质数
其他一些宏定义自行查看即可了解，大部分的东西我都尽可能的进行了优化，之前有个很冗长的，现在修改成这样了，基本也就是最终版本。
1 //XDDDDDDi 2 #include <bits/stdc++.h> 3 using namespace std; 4 #define PB push_back 5 #define MT make_tuple 6 #define MP make_pair 7 #define pii pair<int,int> 8 #define pdd pair<double,double> 9 #define F first 10 #define S second 11 12 #define MOD 1000000007 13 #define PI (acos(-1.0)) 14 #define EPS 1e-6 15 #define MMT(s,a) memset(s, a, sizeof s) 16 #define GO(i,a,b) for(int i = (a); i < (b); ++i) 17 #define GOE(i,a,b) for(int i = (a); i <= (b); ++i) 18 #define OG(i,a,b) for(int i = (a); i > (b); --i) 19 #define OGE(i,a,b) for(int i = (a); i >= (b); --i) 20 21 typedef unsigned long long ull; 22 typedef long long ll; 23 typedef double db; 24 typedef long double ldb; 25 typedef stringstream sstm; 26 int fx[8][2] = {{1,0},{-1,0},{0,1},{0,-1},{1,1},{1,-1},{-1,-1},{-1,1}}; 27 28 template<typename T> using maxHeap = priority_queue<T, vector<T>, less<T> >; 29 template<typename T> using minHeap = priority_queue<T, vector<T>, greater<T> >; 30 31 inline char nc(){ static char buf[1000000], *p1 = buf, *p2 = buf; return p1 == p2 && (p2 = (p1 = buf) + fread(buf,1,1000000,stdin),p1 == p2) ? EOF : *p1++; } 32 #define nc getchar 33 template<typename T> inline int read(T& sum){ char ch = nc(); if(ch == EOF || ch == -1) return 0; int tf = 0; sum = 0; while((ch < '0' || ch > '9') && (ch != '-')) ch = nc(); tf = ((ch == '-') && (ch = nc())); while(ch >= '0' && ch <= '9') sum = sum*10 + (ch-48), ch = nc(); (tf) && (sum = -sum); return 1; } 34 template<typename T,typename... Arg> inline int read(T& sum,Arg&... args){ int ret = read(sum); if(!ret) return 0; return read(args...); } 35 template<typename T1,typename T2> inline void read(T1* a,T2 num){ for(int i = 0; i < num; i++){read(a[i]);} } 36 template<typename T1,typename T2> inline void read(T1* a,T2 bn,T2 ed){ for(;bn <= ed; bn++){read(a[bn]);} } 37 inline void read(char* s){ char ch = nc(); int num = 0; while(ch != ' ' && ch != '\n' && ch != '\r' && ch != EOF){s[num++] = ch;ch = nc();} s[num] = '\0'; } 38 inline void read(string& s){ static char tp[1000005]; char ch = nc(); int num = 0; while(ch != ' ' && ch != '\n' && ch != '\r' && ch != EOF){tp[num++] = ch;ch = nc();} tp[num] = '\0'; s = (string)tp; } 39 template<typename T> inline void print(T k){ int num = 0,ch[20]; if(k == 0){ putchar('0'); return ; } (k<0)&&(putchar('-'),k = -k); while(k>0) ch[++num] = k%10, k /= 10; while(num) putchar(ch[num--]+48); } 40 template<typename T,typename... Arg> inline void print(T k,Arg... args){ print(k),putchar(' '); print(args...);} 41 template<typename T1,typename T2> inline void print(T1* a,T2 num){ print(a[0]); for(int i = 1; i < num; i++){putchar(' '),print(a[i]);} } 42 template<typename T1,typename T2> inline void print(T1* a,T2 bn,T2 ed){ print(a[bn++]); for(;bn <= ed; bn++){putchar(' '),print(a[bn]);} } 43 /*math*/ 44 template<typename T> inline T gcd(T a, T b){ return b==0 ? a : gcd(b,a%b); } 45 template<typename T> inline T lowbit(T x){ return x&(-x); } 46 template<typename T> inline bool mishu(T x){ return x>0?(x&(x-1))==0:false; } 47 template<typename T1,typename T2, typename T3> inline ll q_mul(T1 a,T2 b,T3 p){ ll w = 0; while(b){ if(b&1) w = (w+a)%p; b>>=1; a = (a+a)%p; } return w; } 48 template<typename T,typename T2> inline ll f_mul(T a,T b,T2 p){ return (a*b - (ll)((long double)a/p*b)*p+p)%p; } 49 template<typename T1,typename T2, typename T3> inline ll q_pow(T1 a,T2 b,T3 p){ ll w = 1; while(b){ if(b&1) w = (w*a)%p; b>>=1; a = (a*a)%p;} return w; } 50 template<typename T1,typename T2, typename T3> inline ll s_pow(T1 a,T2 b,T3 p){ ll w = 1; while(b){ if(b&1) w = q_mul(w,a,p); b>>=1; a = q_mul(a,a,p);} return w; } 51 template<typename T> inline ll ex_gcd(T a, T b, T& x, T& y){ if(b == 0){ x = 1, y = 0; return (ll)a; } ll r = exgcd(b,a%b,y,x); y -= a/b*x; return r;/*gcd*/ } 52 template<typename T1,typename T2> inline ll com(T1 m, T2 n) { int k = 1;ll ans = 1; while(k <= n){ ans=((m-k+1)*ans)/k;k++;} return ans; } 53 template<typename T> inline bool isprime(T n){ if(n <= 3) return n>1; if(n%6 != 1 && n%6 != 5) return 0; T n_s = floor(sqrt((db)(n))); for(int i = 5; i <= n_s; i += 6){ if(n%i == 0 || n%(i+2) == 0) return 0; } return 1; } 54 /* ----------------------------------------------------------------------------------------------------------------------------------------------------------------- */ 55 56 int main() { 57 58 59 return 0; 60 }
