Submission #1207104

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207104		lmaobruh	Cipele (COCI18_cipele)	C++20	90 / 90	467 ms	5940 KiB

cipele

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define vi vector<int>
#define fo(i,a,b) for(int i=(a);i<=(b);++i)
#define fd(i,a,b) for(int i=(a);i>=(b);--i)
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define maxi(a,b) a=max(a,b)
#define mini(a,b) a=min(a,b)
#define ii pair<int,int>

const int N = 1e6+5, mod = 1e9+7;

int n, m, a[N], b[N];

bool chk(int d) {
    multiset<int> st;
    fo(i,1,m) st.insert(b[i]);
    fo(i,1,n) {
        auto it = st.lower_bound(a[i]-d);
        if (it!=st.end()&&abs(*it - a[i]) <= d) st.erase(it);
        else return 0;
    }
    return 1;
}

void solve() {
    cin >> n >> m;
    fo(i,1,n) cin >> a[i];
    fo(i,1,m) cin >> b[i];
    sort(a+1, a+n+1); sort(b+1, b+m+1);
    if (n>m) {
        fo(i,1,n) swap(a[i], b[i]);
        swap(n, m);
    }
    int l=0, r=1e9, mid, res=1e9;
    while (l<=r) {
        mid=(l+r)/2;
        if (chk(mid)) res=mid, r=mid-1;
        else l=mid+1;
    }
    cout << res;
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    if (fopen("A.inp", "r"))
        freopen("A.inp", "r", stdin);
    solve();
}

Compilation message (stderr)

cipele.cpp: In function 'int main()':
cipele.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen("A.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

• 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