Submission #564697

#	Time	Username	Problem	Language	Result	Execution time	Memory
564697		Cookie	Solar Storm (NOI20_solarstorm)	C++14	17 / 100	2098 ms	48076 KiB

SolarStorm

#include <bits/stdc++.h>
using namespace std;
#define LIFESUCKS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define ll long long
#define ld long double
#define ar array
#include<cstdio>
#define vt vector
#include<fstream>
//ifstream fin("QUANMA.INP");
//ofstream fout("QUANMA.OUT");
#include<fstream>
#define pb push_back
#define all(c) (c).begin(), (c).end()
//#define length(x) (int)(x).size()
#define fi first
#define se second
#define vt vector
const int mxn = 1e6;
int d[mxn + 3];
int p[mxn + 3];
int main()
{
    int n, s, k; cin >> n >> s >> k;
    ll crpos = 0;
    vt<ll>prefd; prefd.pb(0);
    vt<ll>prefp; prefp.pb(0);
    
    for(int i = 0; i < n - 1; i++){
        cin >> d[i];
        prefd.pb(prefd[i] + d[i]);
        
    }
    for(int i = 0; i < n; i++){
        cin >> p[i];
        prefp.pb(prefp[i] + p[i]);
       
    }
    int left[n], right[n];
    int id[n];
    left[0] = 0;
    for(int i = 1; i < n; i++){
        int l = 0, r = i - 1, ans = i;
        while(l <= r){
            //cout << "aa";
            int mid = (l + r) / 2;
            if(prefd[i] - prefd[mid] <= k){
                ans = mid; r = mid - 1;
            }else{
                l = mid + 1;
            }
        }
        left[i] = ans;
    }
    right[n - 1] = n - 1;
    for(int i = n - 2; i >= 0; i--){
        int l = i + 1, r = n - 1, ans = i;
        while(l <= r){
            int mid = (l + r) / 2;
            if(prefd[mid] - prefd[i] <= k){
                
                ans = mid; l = mid + 1;
            }else{
                r = mid - 1;
            }
        }
        right[i] = ans;
    }
    
    int cr = n - 1;
    int mx[n];
    for(int i = n - 1; i >= 0; i--){
        while(cr >= left[i]){
            mx[cr] = right[i];
            id[cr] = i; 
            cr--;
        }
    }
    
    ll ans = 0, idd = -1;
    for(int i = 0; i < n; i++){
        ll curr = p[i], pos = i;
        for(int j = 0; j < s; j++){
            
            if(pos == n - 1)break;
            
            curr += prefp[mx[pos] + 1] - prefp[pos + 1];
            pos = mx[pos];
            
        }
        if(curr > ans){
            idd = i; 
            ans = curr;
        }
    }
    
    vt<int>anss; anss.pb(id[idd]);
    int pos = idd;
    for(int i = 0; i < s - 1; i++){
        if(pos == n - 1)break;
        pos = mx[pos] + 1;
        if(pos == n)break;
        anss.pb(id[pos]);
        
    }
    
    cout << anss.size() << "\n";
    for(auto i: anss)cout << i + 1 << " ";
    return 0;
}

Compilation message (stderr)

SolarStorm.cpp: In function 'int main()':
SolarStorm.cpp:25:8: warning: unused variable 'crpos' [-Wunused-variable]
   25 |     ll crpos = 0;
      |        ^~~~~

• Subtask 1: 10 / 10
• Subtask 2: 7 / 7
• Subtask 3: 0 / 11
• Subtask 4: 0 / 8
• Subtask 5: 0 / 18
• Subtask 6: 0 / 16
• Subtask 7: 0 / 30