Submission #1147764

#	Time	Username	Problem	Language	Result	Execution time	Memory
1147764		guagua0407	Financial Report (JOI21_financial)	C++20	48 / 100	4094 ms	28752 KiB

Main

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int inf=1e9;
const int mxn=3e5+5;
int mn[mxn][20];

int main() {_
    int n,d;
    cin>>n>>d;
    vector<int> a(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    vector<int> xs;
    xs.push_back(-1);
    for(int i=1;i<=n;i++){
        xs.push_back(a[i]);
    }
    sort(all(xs));
    xs.resize(unique(all(xs))-xs.begin());
    for(int i=1;i<=n;i++){
        a[i]=lower_bound(all(xs),a[i])-xs.begin();
    }
    for(int i=1;i<=n;i++){
        mn[i][0]=a[i];
    }
    for(int j=1;j<20;j++){
        for(int i=1;i+(1<<j)-1<=n;i++){
            mn[i][j]=min(mn[i][j-1],mn[i+(1<<(j-1))][j-1]);
        }
    }
    vector<int> dp(n+1);
    vector<int> curmx(n+1);
    for(int i=1;i<=n;i++){
        for(int j=0;j<a[i];j++){
            dp[i]=max(dp[i],curmx[j]+1);
        }
        if(i>=d){
            int curmn=*min_element(a.begin()+i-d+1,a.begin()+i+1);
            for(int j=0;j<curmn;j++){
                curmx[j]=0;
            }
        }
        curmx[a[i]]=max(curmx[a[i]],dp[i]);
    }
    cout<<*max_element(all(dp))<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//diaoborz

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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