Submission #482023

#	Time	Username	Problem	Language	Result	Execution time	Memory
482023		ak2006	Bigger segments (IZhO19_segments)	C++14	13 / 100	1 ms	316 KiB

segments

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vpii = vector<pii>;
using vpll = vector<pll>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
    fast;
}
int main()
{
    setIO();
    int n;
    cin>>n;
    vi a(n + 1),p(n + 1),best(n + 1),dp(n + 1);
    for (int i = 1;i<=n;i++){cin>>a[i];p[i] = p[i - 1] + a[i];}
    int ans = 1;
    for (int i = 1;i<=n;i++){
        best[i] = max(best[i], best[i - 1]);
        dp[i] = dp[best[i]] + 1;
        int pos = lower_bound(p.begin() + 1,p.end(),2 * p[i] - p[best[i]]) - p.begin();
        best[pos] = max(best[pos],i);
    }
    cout<<dp[n];
    return 0;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:28:9: warning: unused variable 'ans' [-Wunused-variable]
   28 |     int ans = 1;
      |         ^~~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27