Submission #1162241

#	Time	Username	Problem	Language	Result	Execution time	Memory
1162241		arkanefury	Divide and conquer (IZhO14_divide)	C++20	0 / 100	0 ms	324 KiB

divide

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define in insert
#define lb lower_bound
#define F first
#define S second
#define sz size()
#define int long long
#define all(v) v.begin(),v.end()
#define FOR1(x, n) for(int j = x; j <= n; j ++)
#define FOR(x, n, m, d) for(int x = n; x <= m; x += d)
#define FORR(x, n, m, d) for(int x = n; x >= m; x -= d)
#define nikita ios_base::sync_with_stdio(0), cin.tie(0);
const int N =  5e5+5;
int a[N], b[N], pref[N], d[N], c[N], ans, e[N];
int n,m,sum=0,x,y, r, cnt, l, mod = 998244353, inf = -1e18, k;
string s, str;
void dnc(int l = 1, int r = n){
    if(l==r)ans = max(ans, b[l]);
    if(l >= r)return;
    int md = (l+r) >> 1;
    dnc(l, md), dnc(md+1, r);
    map<int, int>mp;
    int prefix = 0, prefix1 = 0;
    FOR(i, md+1, r, 1){
        prefix += c[i];
        prefix1 += b[i];
        mp[a[i] - prefix] = prefix1;
    }
    prefix = prefix1 = 0;
    FORR(i, md, l, 1){
        prefix += c[i];
        prefix1 += b[i];
        if(mp[a[i] + prefix])
        ans = max( mp[a[i] + prefix] + prefix1, ans);
    }
}
void solve(){
    cin >> n;
    FOR(i,1,n,1){
        cin>>a[i]>>b[i]>>c[i];
    }
    dnc();
    cout << ans;
}
signed main(){
    nikita
    int tt = 1;
    if(!tt)cin >> tt;
    FOR(i, 1, tt, 1){
        solve();
    }
}

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