Submission #1179305

#	Time	Username	Problem	Language	Result	Execution time	Memory
1179305		CodeLakVN	Cipele (COCI18_cipele)	C++20	90 / 90	29 ms	1096 KiB

cipele

#include <bits/stdc++.h>
using namespace std;

#define task "18_cipele"
#define no "NO"
#define yes "YES"
#define F first
#define S second
#define vec vector
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)

const int MAX_N = (int)1e5 + 5;

int n, m;
vector<int> a, b;

bool valid(int val) {
    int j = 1;
    FOR(i, 1, n) {
        while (j <= m && abs(b[j] - a[i]) > val) j++;
        if (j > m) return false;
        j++;
    }
    return true;
}

int bs(int lo, int hi) {
    int res = -1;
    while (lo <= hi) {
        int mid = (lo + hi) >> 1;
        if (valid(mid)) hi = (res = mid) - 1;
        else lo = mid + 1; 
    }
    return res;
}

void solve() {
    cin >> n >> m;
    a.resize(n + 1);
    b.resize(m + 1);
    FOR(i, 1, n) cin >> a[i];
    FOR(i, 1, m) cin >> b[i];

    if (n > m) swap(a, b), swap(n, m);
    sort(all(a));
    sort(all(b));

    cout << bs(0, (int)1e9) << "\n";
}

int32_t main() {
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    bool multitest = 0;
    int numTest = 1;
    if (multitest) cin >> numTest;

    while (numTest--) {
        solve();
    }

    return 0;
}

/* Lak lu theo dieu nhac!!!! */

Compilation message (stderr)

cipele.cpp: In function 'int32_t main()':
cipele.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
cipele.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• 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