제출 #707954

#제출 시각아이디문제언어결과실행 시간메모리
707954Dan4Life구경하기 (JOI13_watching)C++17
100 / 100
63 ms8524 KiB
#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=1,j=1,k=1; i <= n; i++){ while(j<=n and a[j]-a[i]<w)j++; while(k<=n and a[k]-a[i]<2*w)k++; P[i]=--j, Q[i]=--k; } for(int i = 0; i <= p; i++){ for(int j = 0; j <= q; j++){ dp[i][j]=0; if(i) dp[i][j] = max(dp[i][j], P[dp[i-1][j]+1]); if(j) dp[i][j] = max(dp[i][j], Q[dp[i][j-1]+1]); if(dp[i][j]>=n) return 1; } } return 0; } 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; } cout << l; }

컴파일 시 표준 에러 (stderr) 메시지

watching.cpp:23:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   23 | main() {
      | ^~~~
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