[工具] 常用代码模板

default.cpp

#include <cstdio>
#include <cctype>
#include <cstring>
#include <algorithm>
using namespace std;
#define File(s) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
typedef long long ll;
template<typename T> inline void gi(T &x){
	char ch; x = 0;
	int f = 1;
	while(isspace(ch = getchar()));
	if(ch == ‘-‘) ch = getchar(), f = -1;
	do x = x * 10 + ch - ‘0‘; while(isdigit(ch = getchar()));
	x *= f;
}
template<class T> void upmax(T &x, T y){x = x>y ? x : y;}
template<class T> void upmin(T &x, T y){x = x<y ? x : y;}

int main(){
	
}

fastio.cpp 包含 fread getchar

#include <cstdio>
#include <cctype>
#include <cstring>
#include <algorithm>
using namespace std;
#define File(s) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
typedef long long ll;
namespace io {
	const int SIZE = (1 << 21) + 1;
	char ibuf[SIZE], *iS, *iT, obuf[SIZE], *oS = obuf, *oT = oS + SIZE - 1, c, qu[55]; int f, qr;
	#define gc() (iS == iT ? (iT = (iS = ibuf) + fread (ibuf, 1, SIZE, stdin), (iS == iT ? EOF : *iS ++)) : *iS ++)
	char getc () {return gc();}
	inline void flush () {fwrite (obuf, 1, oS - obuf, stdout); oS = obuf;}
	inline void putc (char x) {*oS ++ = x; if (oS == oT) flush ();}
	template <class I> inline void gi (I &x) {for (f = 1, c = gc(); c < ‘0‘ || c > ‘9‘; c = gc()) if (c == ‘-‘) f = -1;for (x = 0; c <= ‘9‘ && c >= ‘0‘; c = gc()) x = x * 10 + (c & 15); x *= f;}
	template <class I> inline void print (I x) {if (!x) putc (‘0‘); if (x < 0) putc (‘-‘), x = -x;while (x) qu[++ qr] = x % 10 + ‘0‘,  x /= 10;while (qr) putc (qu[qr --]);}
	struct Flusher_ {~Flusher_(){flush();}}io_flusher_;
}
using io :: gi; using io :: putc; using io :: print; using io :: getc;
template<class T> void upmax(T &x, T y){x = x>y ? x : y;}
template<class T> void upmin(T &x, T y){x = x<y ? x : y;}

int main(){
	
}

modmath.cpp 基础模域运算

const int mod = ;
inline int add(int x, int y) {return x+y>=mod ? x+y-mod : x+y;}
inline int sub(int x, int y) {return x-y<0 ? x-y+mod : x-y;}
inline int mul(int x, int y) {return 1LL * x * y % mod;}
inline void inc(int &x, int y=1) {x += y; if(x >= mod) x -= mod;}
inline void dec(int &x, int y=1) {x -= y; if(x < 0) x += mod;}
inline int power(int x, int y){
	int res = 1;
	for(; y; y>>=1, x = mul(x, x)) if(y & 1) res = mul(res, x);
	return res;
}
inline int inv(int x){return power(x, mod - 2);}

[工具] 常用代码模板

原文：https://www.cnblogs.com/RiverHamster/p/code-template.html