Submission #1186447

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186447		moha1111	Divide and conquer (IZhO14_divide)	C++20	17 / 100	0 ms	328 KiB

divide

#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#define all(a) a.begin() , a.end()
using namespace std;
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
typedef tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>indexed_multiset;

void solve()
{
    int n;
    cin >> n;
    long long a[n + 1] , b[n + 1] , c[n + 1] , d[n + 1] = {} , e[n + 1] = {};
    for(int i = 1 ; i <= n ; i++)
        cin >> a[i] >> b[i] >> c[i] , d[i] = d[i - 1] + b[i] , e[i] = e[i - 1] + c[i];

    long long j = 1 , ans = 0 , cur = 0;

    for(int i = 1 ; i <= n ; i++)
    {
        if(i == 1)
        {
            long long po = 0;
            for(int k = 1 ; k <= n ; k++)
            {
                {
                    po += c[k];
                    if(a[k] - a[i] <= po)
                        j = k , cur = po;
                }
            }
            ans = d[j];
        }
        else
        {
            cur -= c[i - 1];
            if(cur - (a[j] - a[i]) >= 0)
            {
                long long po = cur;
                for(int k = j + 1 ; k <= n ; k++)
                {
                    po += c[k];
                    if(a[k] - a[i] <= po)
                        j = k , cur = po;
                }
            }
            else
            {
                long long po = cur;
                for(int k = i + 1 ; k <= j ; k++)
                {
                    po += c[k];
                    if(a[k] - a[i] <= po)
                    {
                        j = k , cur = po;
                        break;
                    }
                }
            }
            ans = max(ans , d[j] - d[i - 1]);
        }
    }
    cout << ans;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int t = 1;
    // cin >> t;
    while(t--)
        solve();


}

• Subtask 1: 17 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52