제출 #105028

#제출 시각아이디문제언어결과실행 시간메모리
105028bert30702고대 책들 (IOI17_books)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #include "books.h" #define pii pair<int, int> #define F first #define S second using namespace std; const int MX = 1e6 + 100; int boss[MX]; int Find(int u) { return boss[u] == u ? u : boss[u] = Find(boss[u]); } void merge(int a, int b) { boss[Find(a)] = Find(b); } priority_queue<int> pq[MX]; long long minimun_walk(vector<int> p, int s) { long long sum = 0; for(int i = 0; i < p.size(); i ++) boss[i] = i; for(int i = 0; i < p.size(); i ++) sum += abs(i - p[i]), merge(i, p[i]); for(int i = 0; i < p.size(); i ++) pq[Find(i)].push(i); multiset<pii> ms; for(int i = 0; i < p.size(); i ++) { if(i == Find(i)) ms.insert({pq[i].top(), i}); } long long ans = 1ll << 60; for(int i = p.size() - 1; i >= 0; i --) { int a = (--ms.end()) -> F; int b = (ms.begin()) -> F; if((a > s and b > s) or (a < s and b < s)) { ans = min(ans, sum + max(abs(s - a), abs(s - b)) * 2); } else { ans = min(ans, sum + (a - b) * 2); } if((--ms.end()) -> F == i) { int ptr = (--ms.end()) -> S; ms.erase(--ms.end()); pq[ptr].pop(); if(pq[ptr].size()) ms.insert({pq[ptr].top(), ptr}); else return ans; } } }

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'long long int minimun_walk(std::vector<int>, int)':
books.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int i = 0; i < p.size(); i ++) boss[i] = i;
                     ~~^~~~~~~~~~
books.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int i = 0; i < p.size(); i ++) sum += abs(i - p[i]), merge(i, p[i]);
                     ~~^~~~~~~~~~
books.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int i = 0; i < p.size(); i ++) pq[Find(i)].push(i); 
                     ~~^~~~~~~~~~
books.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int i = 0; i < p.size(); i ++) {
                     ~~^~~~~~~~~~
books.cpp:43:5: warning: control reaches end of non-void function [-Wreturn-type]
     }
     ^
/tmp/ccS2Q6eY.o: In function `main':
grader.cpp:(.text.startup+0x23a): undefined reference to `minimum_walk(std::vector<int, std::allocator<int> >, int)'
collect2: error: ld returned 1 exit status