Submission #1007258

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1007258	2024-06-24 14:06:34	snpmrnhlol	Chorus (JOI23_chorus)	C++17	100 / 100	1638 ms	60332 KiB

chorus

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#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e6;
const ll inf = 1e18;
char v[N*2];
int v2[N],v3[N];
ll ps[N + 1];
pair<ll,int> dp[N + 1];
int n,k;
int cnt = 0,cnt2 = 0;
struct line{
    ll k,b,id;
};
bool check(line a,line b,line c){
    if((a.b - b.b)*(b.k - c.k) == (b.b - c.b)*(a.k - b.k)){
        return 1;
    }
    return (a.b - b.b)*(b.k - c.k) <= (b.b - c.b)*(a.k - b.k);
}
struct CHT{
    vector <line> cht;
    int sz = 0, pt = 0;
    void init(){
        cht.clear();
        sz = 0;
        pt = 0;
    }
    void add(ll k,ll b,int id){
        while(sz >= 2 && check(cht[sz - 2],cht[sz - 1],{k,b,id})){
 
 
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• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 21 / 21
• Subtask 4: 26 / 26
• Subtask 5: 13 / 13