제출 #708109

#제출 시각아이디문제언어결과실행 시간메모리
708109Cyanmond고대 책들 (IOI17_books)C++17
컴파일 에러
0 ms0 KiB
#include "books.h" #include <bits/stdc++.h> using i64 = long long; void chmax(i64 &a, i64 b) { if (a < b) a = b; } long long minimum_walk(std::vector<int> p, int s) { const int n = (int)p.size(); std::vector<std::vector<int>> cycles; std::vector<i64> cycleCost; std::vector<bool> used(n); for (int i = 0; i < n; ++i) { if (used[i]) continue; int now = i; std::vector<int> cycle; i64 cost = 0; do { cycle.push_back(now); used[now] = true; const int nx = p[now]; cost += std::abs(nx - now); now = nx; } while (now != i); if (cycle.size() == 1) { continue; } cycles.push_back(std::move(cycle)); cycleCost.push_back(cost); } const int M = (int)cycles.size(); i64 x = 0; for (const auto &vec : cycles) { chmax(x, *std::min_element(vec.begin(), vec.end())); } const i64 costSum = std::accumulate(cycleCost.begin(), cycleCost.end(), 0ll); return costSum + 2 * x; } using namespace std; int main() { int n, s; assert(2 == scanf("%d %d", &n, &s)); vector<int> p((unsigned)n); for (int i = 0; i < n; i++) assert(1 == scanf("%d", &p[(unsigned)i])); long long res = minimum_walk(p, s); printf("%lld\n", res); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:33:15: warning: unused variable 'M' [-Wunused-variable]
   33 |     const int M = (int)cycles.size();
      |               ^
/usr/bin/ld: /tmp/cc8c1wz2.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cccLYC62.o:books.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status