Submission #157578

#	Time	Username	Problem	Language	Result	Execution time	Memory
157578		RoundMango	Rice Hub (IOI11_ricehub)	C++14	0 / 100	5 ms	632 KiB

ricehub

#include <bits/stdc++.h>
using namespace std;
long long a[100005], ans, sum[100005];
long long b;
int besthub(int R, int L, int a[], long long b) {
	long long n, m, l, r, md, mx, ans;
	for (int i = 1; i <= R; i++) 
		sum[i] = sum[i-1] + a[i];
	l = 1; r = R;
	while (l < r) {
		md = (l+r+1)>>1;
		for (int i = md; i <= R; i++) {
			long long xx;
			ans = 1e10;
			n = i-md+1;
			mx = (n+i+1)>>1;
			xx = sum[i] - sum[mx] - (i-mx)*a[mx]  + a[mx]*(mx-n) - sum[mx-1] + sum[n-1];
			ans = min(ans,xx);
		}
	    if (ans <= b) l = md;
		else r = md-1;
	}
	return l;
}

Compilation message (stderr)

ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:6:15: warning: unused variable 'm' [-Wunused-variable]
  long long n, m, l, r, md, mx, ans;
               ^
ricehub.cpp:20:6: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
      if (ans <= b) l = md;
      ^~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 26
• Subtask 4: 0 / 32