Submission #63597440

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#include <bits/stdc++.h>
using namespace std;
using ui = unsigned;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
#define rep(i,l,r) for(int i=(l);i<=(r);++i)
#define per(i,l,r) for(int i=(l);i>=(r);--i)
#define repn(i,n) for(int i=0;i<(n);++i)
#define sizc(x) ((int)(x).size())
#define allc(x) (x).begin(),(x).end()
#define fir first
#define sec second
constexpr int N = 2e5+5;
int n;
ll a[N];
ll f[N];
 
 
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#include <bits/stdc++.h>
using namespace std;

using ui = unsigned;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
#define rep(i,l,r) for(int i=(l);i<=(r);++i)
#define per(i,l,r) for(int i=(l);i>=(r);--i)
#define repn(i,n) for(int i=0;i<(n);++i)
#define sizc(x) ((int)(x).size())
#define allc(x) (x).begin(),(x).end()
#define fir first
#define sec second

constexpr int N = 2e5+5;

int n;
ll a[N];
ll f[N];

signed main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

    cin>>n;
    rep(i,1,n)cin>>a[i];
    f[1]=a[1];
    rep(i,2,n)f[i]=max(f[i-1]+a[i],f[i-2]);
    cout<<f[n]<<'\n';
}

Submission Info

Judge Result