Submission #1275447

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275447		chanhchuong123	Cipele (COCI18_cipele)	C++20	90 / 90	29 ms	1212 KiB

cipele

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

const bool multiTest = false;
#define task "C"
#define fi first
#define se second
#define MASK(i) (1LL << (i))
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define BIT(mask, i) ((mask) >> (i) & 1)

template<typename T1, typename T2> bool minimize(T1 &a, T2 b) {
	if (a > b) a = b; else return 0; return 1;
}
template<typename T1, typename T2> bool maximize(T1 &a, T2 b) {
	if (a < b) a = b; else return 0; return 1;
}

const int MAX = 100010;
int n, m;
int l[MAX];
int r[MAX];

void process(void) {
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) cin >> l[i];
    for (int i = 1; i <= m; ++i) cin >> r[i];

    sort(l + 1, l + 1 + n);
    sort(r + 1, r + 1 + m);

    if (n < m) {
        swap(l, r);
        swap(n, m);
    }

    int ll = -1, rr = max(l[n], r[m]);
    while (rr - ll > 1) {
        int mid = ll + rr >> 1;
        auto f = [&](int x) {
            for (int i = 1, j = 1; i <= m; ++i) {
                while (j <= n && l[j] < r[i] - x) ++j;
                if (j <= n && abs(r[i] - l[j]) <= x) {
                    ++j;
                    continue;
                }
                return false;
            }
            return true;
        };
        if (f(mid)) rr = mid; else ll = mid;
    }
    cout << rr;
}

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

	int nTest = 1; if (multiTest) cin >> nTest;
	while (nTest--) {
		process();
	}

	return 0;
}

Compilation message (stderr)

cipele.cpp: In function 'int main()':
cipele.cpp:60:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |                 freopen(task".inp", "r",  stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
cipele.cpp:61:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |                 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