Submission #671442

#	Time	Username	Problem	Language	Result	Execution time	Memory
671442		smartmonky	Divide and conquer (IZhO14_divide)	C++14	0 / 100	0 ms	212 KiB

divide

#include <bits/stdc++.h>
  
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
using namespace std;

const int N = 100001;
struct st{
	int l, r, g, e;
};
st t[N * 4];
st a[N];
int n;
st merge(st a, st b){
	st res = {};
	if(a.e + b.e - abs(a.r - b.l) < 0){
		if(a.g < b.g)
			return b;
		return a;
	}
	res.g = a.g + b.g;
	res.e = a.e + b.e - abs(a.r - b.l);
	res.l = a.l;
	res.r = b.r;
	return res;
	
}
void build(int v = 1,int tl = 1, int tr = n){
    if(tl == tr){
        t[v] = a[tl];
    }else{
        int mid = (tl + tr) >> 1;
        build(v * 2, tl, mid);
        build(v * 2 + 1,mid + 1, tr);
        t[v] = merge(t[v * 2], t[v * 2 + 1]);
    }
    //cout << tl <<"-" << tr <<" " << t[v].g << endl;
}
int get(int l, int r, int v = 1, int tl = 1, int tr = n){
    if(tl > r || tr < l)
        return 0;
    if(tl >= l && tr <= r){
        return t[v].g;
    }
    int mid = (tl + tr) >> 1;
    return get(l, r, v * 2, tl, mid) + get(l, r, v * 2 + 1, mid + 1, tr);
}

main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
		cin >> a[i].l >> a[i].g >> a[i].e;
		a[i].r = a[i].l;
	}
	build();
	int ans = 0;
	for(int i = 1; i <= n; i++){
		ans = max(ans, get(1, i));
	}
	cout << ans;
}

Compilation message (stderr)

divide.cpp:52:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   52 | main(){
      | ^~~~

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