Submission #1174097

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174097		MPG	Divide and conquer (IZhO14_divide)	C++20	100 / 100	254 ms	135588 KiB

divide

//#pragma GCC optomize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("O3")
//#pragma GCC target("avx2")
//#pragma GCC target("sse,sse2,sse4.1,sse4.2") 



#include <bits/stdc++.h>
using namespace std;
typedef long long       ll;
#define     max_heap priority_queue<pair <ll, pair <ll, ll>>>
//#define     min_heap priority_queue<pair <ll, ll>, vector<pair <ll, ll>>, greater<pair <ll, ll>>>
#define     min_heap priority_queue<pair <ll, pair <ll, ll>>, vector<pair <ll, pair <ll, ll>>>, greater<pair <ll, pair <ll, ll>>>>

#define     sariE cin.tie(NULL); cout.tie(NULL); ios_base::sync_with_stdio(false);
#define     filE freopen("in.txt", "r", stdin);// freopen("out1.txt", "w", stdout); 
#define     endl '\n'
#define     md(a) (a % mod + mod) % mod
#define     pb push_back
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//cout << setprecision(5) << fixed << f;
//hash prime = 769


ll const maxn = 2e5 + 123;
ll const inf = 3e18;
ll const loG = 18; // 23
ll const mod = 1e9 + 7;
//ll const mod = 998244353;
ll const sq = 500;
ll power(ll a, ll b, ll mod){if(b==0)return 1;if(b==1)return a;ll x = power(a, b / 2, mod);return (((x * x) % mod) * (b % 2 ? a : 1)) % mod;}



ll n, arr[maxn][3], ps[maxn][2], bach[maxn * 50][2], ans, id = -1;
vector <ll> seg;

ll add_child(){
    id++;
    seg.pb(id);
    seg[id] = inf;
    return id;
}

void setter(ll i, ll val, ll x, ll lx, ll rx){
    if (rx - lx == 1){
        seg[x] = min(seg[x], val);
        return;
    }
    if (!bach[x][0]){
        bach[x][0] = add_child();
        bach[x][1] = add_child();
    }
    ll mid = (lx + rx) / 2, a = bach[x][0], b = bach[x][1];
    
    if (i < mid){
        setter(i, val, a, lx, mid);
    }
    else{
        setter(i, val, b, mid, rx);
    }
    seg[x] = min(seg[bach[x][0]], seg[bach[x][1]]);
}

ll get(ll l, ll r, ll x, ll lx, ll rx){
    if (l >= rx || lx >= r)
        return inf;
    if (l <= lx && rx <= r)
        return seg[x];
    if (!bach[x][0]){
        bach[x][0] = add_child();
        bach[x][1] = add_child();
    }
    ll mid = (lx + rx) / 2, a = bach[x][0], b = bach[x][1];
    ll val1 = get(l, r, a, lx, mid);
    ll val2 = get(l, r, b, mid, rx);
    return min(val1, val2);
}




void Solve(){

cin >> n;
for (int i = 1; i < n + 1; i++){
    cin >> arr[i][0] >> arr[i][2] >> arr[i][1];
    ps[i][0] += ps[i - 1][0] + arr[i][1];
    ps[i][1] += ps[i - 1][1] + arr[i][2];
}
add_child();
for (int i = 1; i < n + 1; i++){
    ll x = get(arr[i][0] - ps[i][0] + mod, inf, 0, 0, inf);
    //cout << i << ' ' << x << endl;
    ans = max(ans, ps[i][1] - x);
    ans = max(ans, ps[i][1] - ps[i - 1][1]);
    setter(arr[i][0] - ps[i - 1][0] + mod, ps[i - 1][1], 0, 0, inf);
}
cout << ans << endl;


}



int main(){
sariE;
//filE;



int test = 1;
//cin >> test;
while (test--) Solve();
return 0;
}

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