Submission #892520

#	Time	Username	Problem	Language	Result	Execution time	Memory
892520		LeVanThuc	Bigger segments (IZhO19_segments)	C++17	0 / 100	5 ms	27228 KiB

segments

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define p(x,y) pair<ll,ll>(x,y)
#define BIT(i,x) ((x>>i)&1)
#define MASK(x) (1<<x)
#define ld long double
#define __builtin_popcount __builtin_popcountll
#define pll pair<ll,ll>
#define kt cerr << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n"
template<class T1,class T2>
bool maximize(T1 &x,T2 y)
{
    if(x<y)
    {
        x=y;
        return 1;
    }
    return 0;
}
template<class T1,class T2>
bool minimize(T1 &x,T2 y)
{
    if(y<x)
    {
        x=y;
        return 1;
    }
    return 0;
}
const ll M=1e9+7;
template <class T1,class T2>
void add(T1 &x,T2 y)
{
    x+=y;
    if(x>=M) x-=M;
}
template <class T1,class T2>
void sub(T1 &x, T2 y)
{
    x-=y;
    if(x<0) x+=M;
}
void online()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
#ifdef thuc
    freopen("input.inp","r",stdin);
    freopen("output.out","w",stdout);
#else
#endif // thuc
}
const ll N=5e5+10,S=400;
ll n,a[N],f[N];
map<ll,ll> dp[N];
int main()
{
    online();
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        a[i]+=a[i-1];
    }
    ll ans=1;
    dp[1][1]=1;
    f[1]=1;
    for(int i=1;i<=n;i++)
    {
        for(int j=f[i];j>=f[i]-1;j--)
        {
            if(j==0) continue;
            maximize(dp[i+1][j],dp[i][j]);
            maximize(f[i+1],dp[i][j]);
            ll z=a[i]-a[dp[i][j]-1];
            ll nxt=lower_bound(a+1,a+n+1,a[i]+z)-a;
            maximize(dp[nxt][j+1],i+1);
            maximize(f[nxt],j+1);
        }
    }
    cout<<f[n];
    kt;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:68:8: warning: unused variable 'ans' [-Wunused-variable]
   68 |     ll ans=1;
      |        ^~~

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