Submission #1115523

#	Time	Username	Problem	Language	Result	Execution time	Memory
1115523		duytuandao21	Cipele (COCI18_cipele)	C++17	45 / 90	1067 ms	2924 KiB

cipele

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

const int N = 2e5 + 7;
const int infll = 1e18 + 7;
typedef pair<int, int> pii;

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

bool check(int k) {
    // int j = 0;
    // int cnt = 0;
    // for (auto &x : a) {
    //     while (j < b.size() && abs(b[j] - x) > k) ++j;
    //     if (j < b.size() && abs(b[j] - x) <= k) {
    //         // cout << j << ' ' ;
    //         ++cnt;
    //         ++j;
    //     }
    // }
    // if (cnt == a.size()) return true;
    vector<int> mark((int)b.size() + 1, 0);
    int cnt = 0;
    for (auto &x : a) {
        for (int j = 0; j < b.size(); j++) {
            if (mark[j] == 0 && abs(b[j] - x) <= k) {
                ++cnt;
                mark[j] = 1;
                break;
            }
        }
    }
    if (cnt == a.size()) return true;
    return false;
}
signed main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        int x; cin >> x;
        a.push_back(x);
    }
    for (int i = 1; i <= m; i++) {
        int x; cin >> x;
        b.push_back(x);
    }
    if (a.size() > b.size()) swap(a, b);
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    int l = 0, r = 1e9 + 7;
    int res = -1;
    while (l <= r) {
        int mid = (l + r) / 2;
        if (check(mid)) {
            res = mid;
            r = mid - 1;
        } else l = mid + 1;
    }
    cout << res;
}   

Compilation message (stderr)

cipele.cpp: In function 'bool check(long long int)':
cipele.cpp:28:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for (int j = 0; j < b.size(); j++) {
      |                         ~~^~~~~~~~~~
cipele.cpp:36:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     if (cnt == a.size()) return true;
      |         ~~~~^~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9