Submission #88316

#	Time	Username	Problem	Language	Result	Execution time	Memory
88316		ltomic	Cipele (COCI18_cipele)	C++14	90 / 90	63 ms	17220 KiB

cipele

#include <cstdio>
#include <map>
#include <algorithm>

using namespace std;

using par = pair<int, int>;
using llint = long long;

const int MAXN = 1e5+5;
const llint MAXNUM = 1e18;
const int MAXV = 1e9;

int n, m;
int *a, *b;
map<par, llint> mem;
int l[MAXN], r[MAXN], low[MAXN], high[MAXN], best[MAXN], cnt[MAXN];

llint dp(int i, int j) {
  if (i == n) return 0;
  par p = par(i, j);
  if (mem.find(par(i, j)) != mem.end()) return mem[par(i, j)];
  if (j > high[i]) return mem[p] = MAXNUM;
  if (j < low[i]) return mem[p] = dp(i, low[i]);
  return mem[p] = min(dp(i, j+1), dp(i+1, j+1)+abs(a[i]-b[j]));
}

bool f(int x) {
  int pt = 0;
  for (int i = 0; i < n; ++i) {
    while (pt < m && a[i]-b[pt] > x) pt++;
    if (pt >= m || abs(a[i]-b[pt]) > x) return false;
    pt++;
  }
  return true;
}

int main() {
  scanf("%d%d", &n, &m);
  for (int i = 0; i < n; ++i) {
    scanf("%d", l+i);
  }
  for (int i = 0; i < m; ++i) {
    scanf("%d", r+i);
  }

  if (n < m) {
    a = l;
    b = r;
  } else {
    a = r;
    b = l;
    swap(n, m);
  }
/*
  for (int i = 0; i < n; ++i) {
    printf("%d ", a[i]);
  }
  printf("\n");
  for (int i = 0; i < m; ++i) {
    printf("%d ", b[i]);
  }
  printf("\n");
*/
  sort(a, a+n);
  sort(b, b+m);


  int lo = 0, hi = MAXV;
  while (lo < hi) {
    int mid = (lo+hi)/2;
    if (f(mid)) {
      hi = mid;
    } else {
      lo = mid+1;
    }
  }

  printf("%d\n", lo);
  return 0;
}

  

Compilation message (stderr)

cipele.cpp: In function 'int main()':
cipele.cpp:39:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &m);
   ~~~~~^~~~~~~~~~~~~~~~
cipele.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", l+i);
     ~~~~~^~~~~~~~~~~
cipele.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", r+i);
     ~~~~~^~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 9 / 9
• Subtask 9: 9 / 9
• Subtask 10: 9 / 9