Submission #978636

#	Time	Username	Problem	Language	Result	Execution time	Memory
978636		hihihihaw	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	33 ms	7060 KiB

triusis

#pragma GCC optimize("O3,unroll-loops")    
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define pb push_back
#define pii pair<int,int>
#define sz(v) (int)v.size()
#define fi first
#define se second
#define INF 1223372036854775807
#define MOD 1000000007
#define cint(x) int x;cin>>x;
#define cinarr(a,n) int a[n];for (int i=0;i<n;i++) cin>>a[i];
#define coutarr(a) for (auto d:a)cout<<d<<" "; cout<<endl;
#define coutarrD(a) for (auto d:a) cout<<d.fi<<","<<d.se<<" "; cout<<endl;
#define AYBERK_SARICA ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define endl '\n'
#define ld double
#define mid (start+end)/2
 
int t=1;
int interactive=0;
int usaco=0;
int testCase=0;

void solve(){
    int n,m;
    cin>>n>>m;
    cinarr(a,n);
    int b[n+1];
    b[0]=0;
    for (int i=0;i<n;i++) b[i+1]=a[i]-m*(i+1);
    int lis[n+1];
    for (int i=0;i<=n;i++) b[i]*=-1;
    
    for (int i=0;i<=n;i++) lis[i]=INF;

    for (int i=0;i<=n;i++){
        if (b[i]<0) continue;
        int l=0,r=n;
        while (r>=l){
            int md=(l+r)/2;
            if (lis[md]>b[i]) r=md-1;
            else l=md+1;
        }
        lis[l]=b[i];
    }
    int ans=0;
    for (int i=0;i<=n;i++){
        if (lis[i]!=INF) ans++;
    }
    cout<<n+1-ans<<endl;

   


    
    
 
 
    
}
 
 
 
 
 
    
 
 
 
 
 
int32_t main(){
    
    AYBERK_SARICA;
    if (usaco){
        freopen("socdist.in", "r", stdin);
        freopen("socdist.out", "w", stdout);
    }
    if (!interactive){
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
        //freopen("wormsort.out", "w", stdout);
    #endif
    }
    if (t==1) solve();
    else{
        cin>>t;
        while (t--){testCase++;solve();}
    }
    
        
    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int32_t main()':
triusis.cpp:79:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |         freopen("socdist.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
triusis.cpp:80:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |         freopen("socdist.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37