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OI专用头文件，包含自带调试模式的IO类，值得拥有
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| #include <algorithm> | |
| #include <bitset> | |
| #include <complex> | |
| #include <deque> | |
| #include <exception> | |
| #include <fstream> | |
| #include <functional> | |
| #include <iomanip> | |
| #include <ios> | |
| #include <iosfwd> | |
| #include <iostream> | |
| #include <istream> | |
| #include <iterator> | |
| #include <limits> | |
| #include <list> | |
| #include <locale> | |
| #include <map> | |
| #include <memory> | |
| #include <new> | |
| #include <numeric> | |
| #include <ostream> | |
| #include <queue> | |
| #include <set> | |
| #include <sstream> | |
| #include <stack> | |
| #include <stdexcept> | |
| #include <streambuf> | |
| #include <string> | |
| #include <typeinfo> | |
| #include <utility> | |
| #include <valarray> | |
| #include <vector> | |
| #include <array> | |
| #include <atomic> | |
| #include <chrono> | |
| #include <condition_variable> | |
| #include <forward_list> | |
| #include <future> | |
| #include <initializer_list> | |
| #include <mutex> | |
| #include <random> | |
| #include <ratio> | |
| #include <regex> | |
| #include <scoped_allocator> | |
| #include <system_error> | |
| #include <thread> | |
| #include <tuple> | |
| #include <typeindex> | |
| #include <type_traits> | |
| #include <unordered_map> | |
| #include <unordered_set> | |
| //END OF IMPORT | |
| // #define DEBUG 1 // 调试开关 | |
| struct IO { | |
| #define MAXSIZE (1 << 20) | |
| #define isdigit(x) (x >= '0' && x <= '9') | |
| char buf[MAXSIZE], *p1, *p2; | |
| char pbuf[MAXSIZE], *pp; | |
| #if DEBUG | |
| #else | |
| IO() : p1(buf), p2(buf), pp(pbuf) {} | |
| ~IO() { fwrite(pbuf, 1, pp - pbuf, stdout); } | |
| #endif | |
| inline char gc() { | |
| #if DEBUG // 调试，可显示字符 | |
| return getchar(); | |
| #endif | |
| if (p1 == p2) p2 = (p1 = buf) + fread(buf, 1, MAXSIZE, stdin); | |
| return p1 == p2 ? ' ' : *p1++; | |
| } | |
| inline bool blank(char ch) { | |
| return ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t'; | |
| } | |
| template <class T> | |
| inline void read(T &x) { | |
| register double tmp = 1; | |
| register bool sign = 0; | |
| x = 0; | |
| register char ch = gc(); | |
| for (; !isdigit(ch); ch = gc()) | |
| if (ch == '-') sign = 1; | |
| for (; isdigit(ch); ch = gc()) x = x * 10 + (ch - '0'); | |
| if (ch == '.') | |
| for (ch = gc(); isdigit(ch); ch = gc()) | |
| tmp /= 10.0, x += tmp * (ch - '0'); | |
| if (sign) x = -x; | |
| } | |
| inline void read(char *s) { | |
| register char ch = gc(); | |
| for (; blank(ch); ch = gc()) | |
| ; | |
| for (; !blank(ch); ch = gc()) *s++ = ch; | |
| *s = 0; | |
| } | |
| inline void read(char &c) { | |
| for (c = gc(); blank(c); c = gc()) | |
| ; | |
| } | |
| inline void push(const char &c) { | |
| #if DEBUG // 调试，可显示字符 | |
| putchar(c); | |
| #else | |
| if (pp - pbuf == MAXSIZE) fwrite(pbuf, 1, MAXSIZE, stdout), pp = pbuf; | |
| *pp++ = c; | |
| #endif | |
| } | |
| template <class T> | |
| inline void write(T x) { | |
| if (x < 0) x = -x, push('-'); // 负数输出 | |
| static T sta[35]; | |
| T top = 0; | |
| do { | |
| sta[top++] = x % 10, x /= 10; | |
| } while (x); | |
| while (top) push(sta[--top] + '0'); | |
| } | |
| template <class T> | |
| inline void write(T x, char lastChar) { | |
| write(x), push(lastChar); | |
| } | |
| } io; |
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