// #pragma GCC optimize("O3") #include <bits/stdc++.h> using namespace std; using vi = vector<int>; using vvi = vector<vi>; using vvvi = vector<vvi>; using pii = pair<int, int>; using vii = vector<pii>; using vvii = vector<vii>; using l = long long; using vl = vector<l>; using vvl = vector<vl>; using vvvl = vector<vvl>; using pll = pair<l, l>; using vll = vector<pll>; using vvll = vector<vll>; using d = double; using vd = vector<d>; using vvd = vector<vd>; using vvvd = vector<vvd>; using ld = long double; using vld = vector<ld>; using vvld = vector<vld>; using vvvld = vector<vvld>; using vb = vector<bool>; using vvb = vector<vb>; using pbb = pair<bool, bool>; using vbb = vector<pbb>; #define ff first #define ss second #define pb push_back #define eb emplace_back #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() #define sz(x) (int)(x).size() void setIO(string name = "") { ios_base::sync_with_stdio(0); cin.tie(0); if (!name.empty()) { (void)freopen((name + ".in").c_str(), "r", stdin); (void)freopen((name + ".out").c_str(), "w", stdout); } } const ld pi = 3.14159265358979323846; const l LINF = 1e18; const l INF = 1e9; const l MOD = 1e9 + 7; // const l MOD = 998244353; const l MAXN = 2e5 + 5; l n = 1e5 + 1, m = 1e5 + 1; vl a, b; bool check(l u) { int i = 0, j = 0; while (i < n) { if (j >= m) return 0; while (j < m) if (abs(a[i] - b[j++]) > u) ; else break; if (abs(a[i] - b[j - 1]) > u) return false; ++i; } return true; } void solve() { cin >> n >> m; a.resize(n), b.resize(m); for (int i = 0; i < n; ++i) cin >> a[i]; for (int i = 0; i < m; ++i) cin >> b[i]; sort(all(a)), sort(all(b)); if (n > m) swap(a, b), swap(n, m); l lo = 0, hi = 1e9, ans = 0; while (lo <= hi) { l mid = (lo + hi) / 2; if (check(mid)) hi = mid - 1, ans = mid; else lo = mid + 1; } cout << ans; } int main() { setIO(""); #ifndef ONLINE_JUDGE // setIO("filename"); #endif int t = 1; // cin >> t; while (t--) solve(); return 0; }

cipele.cpp: In function 'void setIO(std::string)':
cipele.cpp:53:22: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         (void)freopen((name + ".in").c_str(), "r", stdin);
      |               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cipele.cpp:54:22: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         (void)freopen((name + ".out").c_str(), "w", stdout);
      |               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~