Submission #633507

#	Time	Username	Problem	Language	Result	Execution time	Memory
633507		urosk	Cigle (COI21_cigle)	C++14	0 / 100	3 ms	3412 KiB

cigle

#define here cerr<<"===========================================\n"
#define dbg(x) cerr<<#x<<": "<<x<<endl;
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ld double
#define ll long long
#define llinf 100000000000000000LL // 10^17
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) (ll)(a.size())
#define all(a) a.begin(),a.end()
#define ceri(a,l,r) {cerr<<#a<<": ";for(ll i_ = l;i_<=r;i_++) cerr<<a[i_]<< " ";cerr<<endl;}
#define daj_mi_malo_vremena ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);

using namespace std;
using namespace __gnu_pbds;
/*
ll add(ll x,ll y){
    x+=y;
    if(x<0){
        x%=mod;
        x+=mod;
    }else{
        if(x>=mod) x%=mod;
    }
    return x;
}
ll mul(ll a,ll b){
	ll ans = (a*b)%mod;
	if(ans<0) ans+=mod;
	return ans;
}
*/
typedef tree<int,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
typedef tree<int,null_type,less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_multiset;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll rnd(ll l,ll r){
    return uniform_int_distribution<ll>(l,r)(rng);
}
#define maxn 5005
ll n;
ll a[maxn];
ll ps[maxn];
ll dpmax[maxn];
ll dp[maxn][maxn];
int main(){
	daj_mi_malo_vremena
    cin >> n;
    for(ll i = 1;i<=n;i++) cin >> a[i];
    a[1] = 0;
    for(ll l = 1;l<=n;l++){
        ll j = l-1, cur = a[j];
        for(ll i = 0;i<=l;i++) dpmax[i] = max(dpmax[i-1],dp[i][l]);
        ll delta = 0;
        ll len = 0;
        for(ll r = l+1;r<=n+1;r++){
            dp[l][r] = dp[l][r-1];
            len+=a[r-1];
            while(j>2&&cur<len)j--,cur+=a[j];
            if(cur==len){
                if(j>2) delta++;
                dp[l][r] = max(dp[l][r],dpmax[j-1]+delta);
            }
        }
    }
    ll ans = 0;
    for(ll i = 1;i<=n;i++) ans = max(ans,dp[i][n]);
    cout<<ans<<endl;
	return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 11
• Subtask 3: 0 / 13
• Subtask 4: 0 / 15
• Subtask 5: 0 / 52