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15552번 - 빠른 A+B
jinhan814
C++17
#include <bits/stdc++.h> #define fastio ios::sync_with_stdio(0), cin.tie(0), cout.tie(0); using namespace std; ///////////////////////////////////////////////////////////////////////////////////////////// /* * Author : jinhan814 * Date : 2021-05-05 * Source : https://blog.naver.com/jinhan814/222266396476 * Description : FastIO implementation for cin, cout. */ constexpr int SZ = 1 << 20; class INPUT { private: char read_buf[SZ]; int read_idx, next_idx; bool __END_FLAG__, __GETLINE_FLAG__; public: explicit operator bool() { return !__END_FLAG__; } bool IsBlank(char c) { return c == ' ' || c == '\n'; } bool IsEnd(char c) { return c == '\0'; } char _ReadChar() { if (read_idx == next_idx) { next_idx = fread(read_buf, sizeof(char), SZ, stdin); if (next_idx == 0) return 0; read_idx = 0; } return read_buf[read_idx++]; } char ReadChar() { char ret = _ReadChar(); for (; IsBlank(ret); ret = _ReadChar()); return ret; } template<typename T> T ReadInt() { T ret = 0; char cur = _ReadChar(); bool flag = 0; for (; IsBlank(cur); cur = _ReadChar()); if (cur == '-') flag = 1, cur = _ReadChar(); for (; !IsBlank(cur) && !IsEnd(cur); cur = _ReadChar()) ret = 10 * ret + (cur & 15); if (IsEnd(cur)) __END_FLAG__ = 1; return flag ? -ret : ret; } string ReadString() { string ret; char cur = _ReadChar(); for (; IsBlank(cur); cur = _ReadChar()); for (; !IsBlank(cur) && !IsEnd(cur); cur = _ReadChar()) ret.push_back(cur); if (IsEnd(cur)) __END_FLAG__ = 1; return ret; } double ReadDouble() { string ret = ReadString(); return stod(ret); } string getline() { string ret; char cur = _ReadChar(); for (; cur != '\n' && !IsEnd(cur); cur = _ReadChar()) ret.push_back(cur); if (__GETLINE_FLAG__) __END_FLAG__ = 1; if (IsEnd(cur)) __GETLINE_FLAG__ = 1; return ret; } friend INPUT& getline(INPUT& in, string& s) { s = in.getline(); return in; } } _in; class OUTPUT { private: char write_buf[SZ]; int write_idx; public: ~OUTPUT() { Flush(); } explicit operator bool() { return 1; } void Flush() { fwrite(write_buf, sizeof(char), write_idx, stdout); write_idx = 0; } void WriteChar(char c) { if (write_idx == SZ) Flush(); write_buf[write_idx++] = c; } template<typename T> int GetSize(T n) { int ret = 1; for (n = n >= 0 ? n : -n; n >= 10; n /= 10) ret++; return ret; } template<typename T> void WriteInt(T n) { int sz = GetSize(n); if (write_idx + sz >= SZ) Flush(); if (n < 0) write_buf[write_idx++] = '-', n = -n; for (int i = sz; i-- > 0; n /= 10) write_buf[write_idx + i] = n % 10 | 48; write_idx += sz; } void WriteString(string s) { for (auto& c : s) WriteChar(c); } void WriteDouble(double d) { WriteString(to_string(d)); } } _out; /* operators */ INPUT& operator>> (INPUT& in, char& i) { i = in.ReadChar(); return in; } INPUT& operator>> (INPUT& in, string& i) { i = in.ReadString(); return in; } template<typename T, typename std::enable_if_t<is_arithmetic_v<T>>* = nullptr> INPUT& operator>> (INPUT& in, T& i) { if constexpr (is_floating_point_v<T>) i = in.ReadDouble(); else if constexpr (is_integral_v<T>) i = in.ReadInt<T>(); return in; } OUTPUT& operator<< (OUTPUT& out, char i) { out.WriteChar(i); return out; } OUTPUT& operator<< (OUTPUT& out, string i) { out.WriteString(i); return out; } template<typename T, typename std::enable_if_t<is_arithmetic_v<T>>* = nullptr> OUTPUT& operator<< (OUTPUT& out, T i) { if constexpr (is_floating_point_v<T>) out.WriteDouble(i); else if constexpr (is_integral_v<T>) out.WriteInt<T>(i); return out; } /* macros */ #define fastio 1 #define cin _in #define cout _out #define istream INPUT #define ostream OUTPUT ///////////////////////////////////////////////////////////////////////////////////////////// int main() { fastio; int n; cin >> n; while (n--) { int a, b; cin >> a >> b; cout << a + b << '\n'; } }
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