oj.uz

Submission #109894

# Submission time Handle Problem Language Result Execution time Memory
109894 2019-05-08T10:49:00 Z cgiosy Watching (JOI13_watching) C++17
50 / 100
 34 ms 12408 KB 
#include <cstdio>
#include <cstring>
#include <algorithm>
#define rep(i,x,n) for(int i=x; i<=n; i++)

int a[2048], d[2048][2048], n, x, y;
int main() {
	scanf("%d%d%d", &n, &x, &y);
	if(n<x) x=n;
	rep(i, 1, n) scanf("%d", a+i);
	std::sort(a, a+n+1);

	int l=0, r=1e9;
	while(l<r) {
		int m=(l+r)/2, p=1, q=1;
		memset(d[1], 0x3f, 2047*2048*2);
		rep(i, 1, n) {
			while(p<=n && a[p]<=a[i]-m) p++;
			while(q<=n && a[q]<=a[i]-2*m) q++;
			rep(j, 1, x) d[i][j]=std::min(d[p-1][j-1], d[q-1][j]+1);
		}
		if(d[n][x]<=y) r=m;
		else l=m+1;
	}
	printf("%d", r);
}

Compilation message

watching.cpp: In function 'int main()':
watching.cpp:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &n, &x, &y);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
watching.cpp:10:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  rep(i, 1, n) scanf("%d", a+i);
               ~~~~~^~~~~~~~~~~

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 8576 KB Output is correct
2 Correct 22 ms 8448 KB Output is correct
3 Correct 23 ms 8448 KB Output is correct
4 Correct 27 ms 8576 KB Output is correct
5 Correct 23 ms 8576 KB Output is correct
6 Correct 25 ms 8576 KB Output is correct
7 Correct 28 ms 8524 KB Output is correct
8 Correct 23 ms 8576 KB Output is correct
9 Correct 26 ms 8584 KB Output is correct
10 Correct 21 ms 8496 KB Output is correct
11 Correct 29 ms 8560 KB Output is correct
12 Correct 26 ms 8576 KB Output is correct
13 Correct 28 ms 8576 KB Output is correct
14 Correct 34 ms 8448 KB Output is correct
15 Correct 21 ms 8576 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Incorrect 28 ms 12408 KB Output isn't correct
2 Halted 0 ms 0 KB -