제출 #737339

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
737339		keisuke6	밀림 점프 (APIO21_jumps)	C++14	0 / 100	7 ms	9828 KiB

jumps

#include "jumps.h"

#include <vector>
#include <queue>
using namespace std;
vector<vector<int>> G(200100);
int n;
void init(int N, std::vector<int> H) {
  int n = N;
  for(int i=0;i<N;i++){
    int now = i-1;
    while(now >= 0 && H[now] < H[i]) now--;
    if(now != -1) G[i].push_back(now);
    now = i+1;
    while(now < N && H[now] < H[i]) now++;
    if(now != N) G[i].push_back(now);
  }
  return;
}

int minimum_jumps(int A, int B, int C, int D) {
  vector<int> dist(n,1e9);
  queue<int> q;
  for(int i=A;i<=B;i++){
    dist[i] = 0;
    q.push(i);
  } 
  while(!q.empty()){
    int pos = q.front();
    q.pop();
    for(int x:G[pos]){
      if(dist[x] != 1e9) continue;
      dist[x] = dist[pos] + 1;
      q.push(x);
    }
  }
  int ans = 1e9;
  for(int i=C;i<=D;i++) ans = min(ans,dist[i]);
  return (ans == 1e9 ? -1 : ans);
}

컴파일 시 표준 에러 (stderr) 메시지

jumps.cpp: In function 'void init(int, std::vector<int>)':
jumps.cpp:9:7: warning: unused variable 'n' [-Wunused-variable]
    9 |   int n = N;
      |       ^

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