Submission #1264362

#	Time	Username	Problem	Language	Result	Execution time	Memory
1264362		tminh	Room Temperature (JOI24_ho_t1)	C++20	35 / 100	1 ms	328 KiB

Main

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

#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>


#define ep emplace_back
#define pb push_back
#define pf push_front


const ll mod = 1e9 + 7;
const int N = 1e6 + 5;
const ll oo = 1e18;

bool START;

int n, t, ans;
map<int, bool> mp;
vector<int> arr;

inline void solve() {
	for (auto[val, cnt] : mp) arr.pb(val);
	int mid = (arr.back() + arr[0]) / 2;
	
	int ans = t;
	ans = min(ans, max(abs(arr.back() - mid), abs(arr[0] - mid)));
	++mid;
	ans = min(ans, max(abs(arr.back() - mid), abs(arr[0] - mid)));
	cout << ans;
	
}


inline void input() {
    cin >> n >> t;
    ans = 0;
    for (int i = 1; i <= n; ++i) {
    	int x; cin >> x;
    	x %= t;
		x = min(x, t - x);
		mp[x] = true;  
    }
    return solve();
}
bool END;

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

    input();
    
    
    cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
    cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:58:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.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 ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 5 / 5
• Subtask 3: 30 / 30
• Subtask 4: 0 / 35
• Subtask 5: 0 / 15