제출 #1207576

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1207576		cheat_when_I_was_young	Hack (APIO25_hack)	C++17	컴파일 에러	0 ms	0 KiB

hack

int hack() {
    vector<long long> a;
    for (int i = 1; i <= 1000000; ++i) a.emplace_back(i);
    long long res = collisions(a);
    for (int n = 1; n <= 1000000; ++n) {
        int q = 1000000 / n;
        int r = 1000000 % n;
        long long val = (long long)q * (q - 1) / 2 * n + (long long)q * r;
        if (val == res) return n;
    }
    return -1;
}

컴파일 시 표준 에러 (stderr) 메시지

hack.cpp: In function 'int hack()':
hack.cpp:2:5: error: 'vector' was not declared in this scope
    2 |     vector<long long> a;
      |     ^~~~~~
hack.cpp:2:12: error: expected primary-expression before 'long'
    2 |     vector<long long> a;
      |            ^~~~
hack.cpp:3:40: error: 'a' was not declared in this scope
    3 |     for (int i = 1; i <= 1000000; ++i) a.emplace_back(i);
      |                                        ^
hack.cpp:4:32: error: 'a' was not declared in this scope
    4 |     long long res = collisions(a);
      |                                ^
hack.cpp:4:21: error: 'collisions' was not declared in this scope
    4 |     long long res = collisions(a);
      |                     ^~~~~~~~~~