Submission #212069

#	Time	Username	Problem	Language	Result	Execution time	Memory
212069		NONAME	Nivelle (COCI20_nivelle)	C++17	24 / 110	1087 ms	512 KiB

nivelle

#include <bits/stdc++.h>

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")

#define F first
#define S second
#define sz(x) int(x.size())

using namespace std;

typedef long double ld;



int main()
{
    //freopen("army.in","r",stdin); freopen("army.out","w",stdout);
    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n;

    cin >> n;

    string s;

    cin >> s;

    bool f = 1;
	
  	set <char> se; se.clear();
  
    for (int i = 0; i < n; i++)
        if (s[i] != 'a' && s[i] != 'b') f = 0;
	
  	for (int i = 0; i < n; i++) se.insert(s[i]);
  
    ld ans = 1e18, l, r;

    if (f)
    {
        char lst = s[0];

        int k = 1;

        for (int i = 1; i < n; i++)
        {
            if (lst == s[i]) {k++; continue;}

            ld x = 1, y = k;

            if (x / y < ans) {ans = x / y; r = i - 1; l = i - k;}

            lst = s[i];

            k = 1;
        }

        ld x = 1, y = k;

        if (x / y < ans) {ans = x / y; r = n - 1; l = n - k;}

        x = sz(se); y = n;

        if (x / y < ans) {ans = x / y; r = n - 1; l = 0;}

        cout << l << " " << r << endl;

        exit(0);
    }

    for (int i = 0; i < n; i++)
    {
        set <char> se; se.clear();

        for (int j = i; j < n; j++)
        {
            se.insert(s[j]);

            ld x = sz(se), y =  j - i + 1;

            if (ans > x / y) {ans = x / y; l = i; r = j;}
        }
    }
    cout << l + 1 << " " << r + 1 << endl;
}

Compilation message (stderr)

nivelle.cpp: In function 'int main()':
nivelle.cpp:33:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i = 0; i < n; i++)
     ^~~
nivelle.cpp:36:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    for (int i = 0; i < n; i++) se.insert(s[i]);
    ^~~
nivelle.cpp:85:33: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << l + 1 << " " << r + 1 << endl;
                                 ^
nivelle.cpp:85:17: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << l + 1 << " " << r + 1 << endl;
                 ^

• Subtask 1: 7 / 7
• Subtask 2: 17 / 17
• Subtask 3: 0 / 13
• Subtask 4: 0 / 25
• Subtask 5: 0 / 48