Submission #431266

#	Time	Username	Problem	Language	Result	Execution time	Memory
431266		cpp219	Financial Report (JOI21_financial)	C++14	0 / 100	6 ms	1376 KiB

Main

#pragma GCC optimization "O2"
#pragma GCC optimization "unroll-loop"
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 3e3 + 9;
const ll inf = 1e9 + 7;
typedef pair<ll,ll> LL;
vector<ll> v,g[N];
ll n,D,a[N],dp[N];

ll Find(ll x){
    return lower_bound(v.begin(),v.end(),x) - v.begin() + 1;
}

void compress(){
    sort(v.begin(),v.end()); v.resize(unique(v.begin(),v.end()) - v.begin());
    for (ll i = 1;i <= n;i++) a[i] = Find(a[i]),g[a[i]].push_back(i);
    for (ll i = 1;i <= n;i++) g[i].push_back(inf);
}
ll st[4*N];

void upd(ll id,ll l,ll r,ll u,ll val){
    if (u < l||r < u) return;
    if (l == r){
        st[id] = val; return;
    }
    ll mid = (l + r)/2;
    upd(id*2,l,mid,u,val); upd(id*2 + 1,mid + 1,r,u,val);
    st[id] = max(st[id*2],st[id*2 + 1]);
}

ll Get(ll id,ll l,ll r,ll u,ll v){
    if (v < l||r < u) return 0;
    if (u <= l&&r <= v) return st[id];
    ll mid = (l + r)/2;
    return max(Get(id*2,l,mid,u,v),Get(id*2 + 1,mid + 1,r,u,v));
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n>>D;
    for (ll i = 1;i <= n;i++) cin>>a[i],v.push_back(a[i]);
    memset(dp,1,sizeof(dp)); compress();
    ll ans = 1; upd(1,1,n,a[1],1);
    for (ll i = 2;i <= n;i++){
        ll L = i - D - 1,now;
        if (L > 0){
            now = a[L];
            ll nxt = *lower_bound(g[now].begin(),g[now].end(),L + 1);
            if (nxt > i) upd(1,1,n,a[L],0);
        }
        dp[i] = Get(1,1,n,1,a[i] - 1) + 1; upd(1,1,n,a[i],dp[i]);
        //cout<<i<<" "<<Get(1,1,n,1,a[i] - 1)<<"\n";
        ans = max(ans,dp[i]);
    }
    cout<<ans;
}

Compilation message (stderr)

Main.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
Main.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
Main.cpp: In function 'int main()':
Main.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35