Submission #515853

#	Time	Username	Problem	Language	Result	Execution time	Memory
515853		_Monkey_	Financial Report (JOI21_financial)	C++17	65 / 100	176 ms	478280 KiB

Main

// Song Đồng Gia Phúc

/*
 *      ʕ•ᴥ•ʔ
 *  [Penguin_024]
 *       U U
 */

#include<bits/stdc++.h>
using namespace std;

#define el '\n'
#define ll long long
#define ull unsigned long long
#define vll vector<ll>
#define double double
#define fi first
#define se second
#define cico(A) freopen(A".INP","r",stdin); freopen(A".OUT","w",stdout);
template<typename x,typename y> void amin(x &a,y b){if(b<a) a=b;}
template<typename x,typename y> void amax(x &a,y b){if(b>a) a=b;}
const int maxn=3e5+7,maxq=19*1e4+7;
const string yes="YES\n",no="NO\n";

int n,d,a[maxn];
int ans,res,oo=1e9+7;

/////// SUB 4
void sub4(){
    vector<int> f;
    ans = 0;
    for(int i=n;i>0;--i){
        while( !f.empty() && a[i]>=f.back() ) f.pop_back();
        f.push_back(a[i]);
        amax( ans , f.size() );
    }
    cout << ans;
}

/////// SUB 1
void quaylui(int id,int maxi,int sum,int kc){
    if(kc>=d) return;
    if(id==n+1){
        amax(ans,sum);
        return;
    }
    quaylui( id+1 , max(maxi,a[id]) , sum + (a[id]>maxi) , 0 );
    quaylui( id+1 , maxi , sum , kc + (sum>0) );
}

void sub1(){
    ans = 0;
    quaylui(1,-1,0,0);
    cout << ans;
}

/////// SUB 5
void sub5(){
    vector<int> f(1,-1);
    for(int i=1;i<=n;++i){
        if( a[i]>f.back() ){
            f.push_back(a[i]);
        } else {
            res = lower_bound( f.begin() , f.end() , a[i] ) - f.begin();
            f[res] = a[i];
        }
    }
    ans = f.size() - 1;
    cout << ans;
}

/////// SUB 2
void sub2(){
    const int maxx=407;
    int dp[maxx][maxn];
    for(int i=1;i<=n;++i){
        for(int j=1;j<=n;++j) dp[i][j] = oo;
    }
    for(int i=1;i<=n;++i){
        dp[i][1] = a[i];
        for(int j=i-1;j>0 && i-j<=d;j--){
            for(int z=2;z<=i;z++){
                if( a[i] > dp[j][z-1] ) amin( dp[i][z] ,a[i] );
                amin( dp[i][z] , max(dp[j][z],a[i]) );
            }
        }
    }
    for(int i=1;i<=n;++i) if(dp[n][i] < oo) ans=i;
    cout << ans;
}

/////// SUB 3
void sub3(){
    const int maxx = 7e3+7;
    int dp[maxx],kc;
    ans = 0;
    for(int i=1;i<=n;++i){
        dp[i] = 1;
        kc=0;
        for(int j=i-1;j>0 && kc<d;--j){
            if( a[i] > a[j] ){
                amax( dp[i] , dp[j] + 1 );
                kc=0;
            } else kc++;
        }
        amax( ans , dp[i] );
    }
    cout << ans;
}

signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);

    cin >> n >> d;
    for(int i=1;i<=n;++i){
        cin >> a[i];
    }

    // sub 4
    if(d==1){
        sub4();
        return 0;
    }

    // sub 1
    if(n<=20){
        sub1();
        return 0;
    }

    // sub 5
    if(d==n){
        sub5();
        return 0;
    }

    // sub 2
    if(n<=400){
        sub2();
        return 0;
    }

    // sub 3
    if(n<=7000){
        sub3();
        return 0;
    }

    return 0;
}

Compilation message (stderr)

Main.cpp: In instantiation of 'void amax(x&, y) [with x = int; y = long unsigned int]':
Main.cpp:35:30:   required from here
Main.cpp:21:57: warning: comparison of integer expressions of different signedness: 'long unsigned int' and 'int' [-Wsign-compare]
   21 | template<typename x,typename y> void amax(x &a,y b){if(b>a) a=b;}
      |                                                        ~^~

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