Submission #684442

#	Time	Username	Problem	Language	Result	Execution time	Memory
684442		Chal1shkan	Bigger segments (IZhO19_segments)	C++14	0 / 100	1 ms	340 KiB

segments

# include <bits/stdc++.h>

# define pb push_back
# define ff first
# define ss second
# define nl "\n"
# define sz(x) ((int)(x).size())

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const ll maxn = 2e5 + 25;
const ll inf = 1e18 + 0;
const ll mod = 1e9 + 7;
const ll dx[] = {-1, 1, 0, 0};
const ll dy[] = {0, 0, -1, 1};

using namespace std;

ll n, a[maxn], pref[maxn];
pair <ll, ll> dp[maxn];

void ma1n (/* SABR */)
{
    cin >> n;
    for (ll i = 1; i <= n; ++i)
    {
        cin >> a[i];
        pref[i] = pref[i - 1] + a[i];
    }
    ll ans = 0;
    for (ll i = 1; i <= n; ++i)
    {
        ll pos = -1, mx = 0, sum = inf;
        for (ll j = 1; j < i; ++j)
        {
            if (dp[j].ff > mx && dp[j].ss <= pref[i] - pref[j])
            {
                mx = dp[j].ff;
                pos = j;
                sum = pref[i] - pref[j];
            }
            else if (dp[j].ff == mx && sum > pref[i] - pref[j])
            {
                pos = j;
                sum = pref[i] - pref[j];
            }
        }
        if (pos != -1) dp[i].ff = dp[pos].ff + 1, dp[i].ss = pref[i] - pref[pos];
        else 
        {
            if (i == 1) dp[i].ff = 1;
            dp[i].ff += dp[i - 1].ff;
            dp[i].ss = dp[i - 1].ss + a[i];
        }
        ans = max(ans, dp[i].ff);
       // cout << dp[i].ff << ' ' << dp[i].ss << ' ' << pos << endl;
    }
    cout << dp[n].ff << nl;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
//  freopen("file.in", "r", stdin);
//  freopen("file.out", "w", stdout);
    int ttt = 1;
//  cin >> ttt;
    for (int test = 1; test <= ttt; ++test)
    {
//      cout << "Case " << test << ":" << ' ';
        ma1n();
    }
    return 0;
}

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