제출 #707953

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
707953	2023-03-10 15:03:43	Dan4Life	구경하기 (JOI13_watching)	C++17	100 / 100	250 ms	15992 KiB

watching

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#include <bits/stdc++.h>
using namespace std;
const int mxN = (int)2e3+10, LINF = (int)1e9;
int n, p, q, a[mxN], P[mxN], Q[mxN], dp[mxN][mxN];
 
bool work(int w){
  for(int i=2,j=1,k=1; i <= n; i++){
    while(a[i]-a[j]+1>w) j++;
    while(a[i]-a[k]+1>2*w) k++;
    P[i]=j-1,Q[i]=k-1;
  }
  for(int i = 1; i <= n; i++){
    for(int j = 0; j <= q; j++){
      dp[i][j] = min(LINF, dp[P[i]][j]+1);
      if(j) dp[i][j] = min(dp[i][j], dp[Q[i]][j-1]);
    }
  }
  return dp[n][q]<=p;
}
 
main() {
  cin >> n >> p >> q;
  for(int i = 1; i <= n; i++) cin >> a[i];
  sort(a+1,a+n+1);
  if(p+q>=n){cout<<1;return 0;}
  int l = 1, r = (int)1e9;
  while(l<r){
    int mid = (l+r)/2;
    if(work(mid)) r=mid;
    else l=mid+1;
 
 
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컴파일 시 표준 에러 (stderr) 메시지

watching.cpp:21:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   21 | main() {
      | ^~~~

• Subtask 1: 50 / 50
• Subtask 2: 50 / 50