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11921번 - 0.1
jinhan814
C++17
#include <bits/stdc++.h> #include <sys/stat.h> #include <sys/mman.h> using namespace std; ///////////////////////////////////////////////////////////////////////////////////////////// /* * Author : jinhan814 * Date : 2021-04-16 * Source : https://blog.naver.com/jinhan814/222266396476 * Description : FastIO implementation for cin, cout. (mmap ver.) */ constexpr int INPUT_SZ = 45000000; constexpr int OUTPUT_SZ = 1 << 20; class INPUT { private: char* p; bool __END_FLAG__, __GETLINE_FLAG__; public: explicit operator bool() { return !__END_FLAG__; } INPUT() { p = (char*)mmap(0, INPUT_SZ, PROT_READ, MAP_SHARED, 0, 0); } bool is_blank(char c) { return c == ' ' || c == '\n'; } bool is_end(char c) { return c == '\0'; } char _readChar() { return *p++; } char readChar() { char ret = _readChar(); while (is_blank(ret)) ret = _readChar(); return ret; } template<typename T> T readInt() { T ret = 0; char cur = _readChar(); bool flag = 0; while (is_blank(cur)) cur = _readChar(); if (cur == '-') flag = 1, cur = _readChar(); while (!is_blank(cur) && !is_end(cur)) ret = 10 * ret + cur - '0', cur = _readChar(); if (is_end(cur)) __END_FLAG__ = 1; return flag ? -ret : ret; } string readString() { string ret; char cur = _readChar(); while (is_blank(cur)) cur = _readChar(); while (!is_blank(cur) && !is_end(cur)) ret.push_back(cur), cur = _readChar(); if (is_end(cur)) __END_FLAG__ = 1; return ret; } double readDouble() { string ret = readString(); return stod(ret); } string getline() { string ret; char cur = _readChar(); while (cur != '\n' && !is_end(cur)) ret.push_back(cur), cur = _readChar(); if (__GETLINE_FLAG__) __END_FLAG__ = 1; if (is_end(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[OUTPUT_SZ]; int write_idx; public: ~OUTPUT() { bflush(); } void bflush() { fwrite(write_buf, sizeof(char), write_idx, stdout); write_idx = 0; } void writeChar(char c) { if (write_idx == OUTPUT_SZ) bflush(); write_buf[write_idx++] = c; } template<typename T> int getSize(T n) { int ret = 1; if (n < 0) n = -n; while (n >= 10) ret++, n /= 10; return ret; } template<typename T> void writeInt(T n) { int sz = getSize(n); if (write_idx + sz >= OUTPUT_SZ) bflush(); if (n < 0) write_buf[write_idx++] = '-', n = -n; for (int i = sz - 1; i >= 0; i--) write_buf[write_idx + i] = n % 10 + '0', n /= 10; 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_integral_v<T>>* = nullptr> INPUT& operator>> (INPUT& in, T& i) { i = in.readInt<T>(); return in; } template<typename T, typename std::enable_if_t<is_floating_point_v<T>>* = nullptr> INPUT& operator>> (INPUT& in, T& i) { i = in.readDouble(); 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_integral_v<T>>* = nullptr> OUTPUT& operator<< (OUTPUT& out, T i) { out.writeInt<T>(i); return out; } template<typename T, typename std::enable_if_t<is_floating_point_v<T>>* = nullptr> OUTPUT& operator<< (OUTPUT& out, T i) { out.writeDouble(i); return out; } /* macros */ #define fastio 1 #define cin _in #define cout _out #define istream INPUT #define ostream OUTPUT ///////////////////////////////////////////////////////////////////////////////////////////// using ull = unsigned long long; int main() { fastio; ull n, t, sum = 0; cin >> n; for (int i = 0; i < n; i++) cin >> t, sum += t; cout << n << '\n' << sum << '\n'; }
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5000000점
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