Submission #171378

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
171378	2019-12-28 12:44:24	donentseto	Bigger segments (IZhO19_segments)	C++14	100 / 100	124 ms	13176 KiB

segments

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#include <bits/stdc++.h>
using namespace std;
long long n, a [500005], b [500005];
int main (){
    ios::sync_with_stdio (false);
    cin.tie (0);
    cin >> n;
    for (int i = 1; i <= n; i ++){
        cin >> a [i];
        a [i] += a [i - 1];
    }
    for (int i = 1; i <= n; i ++){
        b [i] = max (b [i - 1], b [i]);
        long long x = a [i] - a [b [i]];
        int idx = lower_bound (a, a + n + 1, a [i] + x) - a;
        b [idx] = i;
    }
    int ans = 0;
    for (int i = n; i > 0; i = b [i]) ans ++;
    cout << ans << '\n';
}
 
 
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• Subtask 1: 13 / 13
• Subtask 2: 14 / 14
• Subtask 3: 10 / 10
• Subtask 4: 36 / 36
• Subtask 5: 27 / 27