Submission #757278

#	Time	Username	Problem	Language	Result	Execution time	Memory
757278		racsosabe	Cipele (COCI18_cipele)	C++14	90 / 90	52 ms	2856 KiB

cipele

#include<bits/stdc++.h>
using namespace::std;
 
const int N = 100000 + 5;
 
int n;
int m;
int a[N];
int b[N];
 
bool can(int L) {
    int at = 1;
    for(int i = 1; i <= n; i++) {
        while(at <= m and b[at] < a[i] - L) at += 1;
        if(at <= m and b[at] <= a[i] + L) {
            at += 1;
            continue;
        }
        return false;
    }
    return true;
}

void swap() {
    for(int i = 1; i <= max(n, m); i++) swap(a[i], b[i]);
    swap(n, m);
}

int main(){
	scanf("%d %d", &n, &m);
    for(int i = 1; i <= n; i++) scanf("%d", a + i);
    for(int i = 1; i <= m; i++) scanf("%d", b + i);
    if(n > m) swap();
    sort(a + 1, a + n + 1);
    sort(b + 1, b + m + 1);
    int lo = 0, hi = 1000000000;
    while(lo < hi) {
        int mi = lo + (hi - lo) / 2;
        if(not can(mi)) lo = mi + 1;
        else hi = mi;
    }
    printf("%d\n", lo);
	return 0;
}

Compilation message (stderr)

cipele.cpp: In function 'int main()':
cipele.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |  scanf("%d %d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~~
cipele.cpp:31:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     for(int i = 1; i <= n; i++) scanf("%d", a + i);
      |                                 ~~~~~^~~~~~~~~~~~~
cipele.cpp:32:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     for(int i = 1; i <= m; i++) scanf("%d", b + 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