Submission #1260404

#	Time	Username	Problem	Language	Result	Execution time	Memory
1260404		tminh	Nivelle (COCI20_nivelle)	C++20	110 / 110	23 ms	328 KiB

nivelle

#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;

char a[N];
int n, cnt[26];

inline void solve() {
	
	int tu = n + 1, mau = 1, l = 0, r = 0;
	for (int x = 1; x <= 26; ++x) {
		
		for (int i = 0; i < 26; ++i) cnt[i] = 0;
		
		int j = 1, cur = 0;
		for (int i = 1; i <= n; ++i) {		
			// cout << i << " " << j - 1 << " " << cur << endl;
			
			while(j <= n && cur + !cnt[a[j] - 'a'] <= x) {
				cur += !cnt[a[j] - 'a'];
				++cnt[a[j] - 'a'];
				++j;
			}
			if (cur == x) {
				if (mau * x <= tu * (j - i)) {
					mau = j - i;
					tu = x;
					
					l = i;
					r = j - 1;
				}
			}
			--cnt[a[i] - 'a'];
			cur -= !cnt[a[i] - 'a'];
		}
	}
	cout << l << " " << r;
}


inline void input() {
    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> a[i];
    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)

nivelle.cpp: In function 'int main()':
nivelle.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
nivelle.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 17 / 17
• Subtask 3: 13 / 13
• Subtask 4: 25 / 25
• Subtask 5: 48 / 48