Submission #45063

#	Time	Username	Problem	Language	Result	Execution time	Memory
45063		rajarshi_basu	Divide and conquer (IZhO14_divide)	C++14	48 / 100	1073 ms	4824 KiB

divide

#include <iostream>
#include <algorithm>
#include <stack>
#include <string>
#include <stdio.h>
#include <cmath>
#include <queue>
#include <functional>


#define FOR(i,n) for(int i=0;i<n;i++)
#define FORE(i,a,b) for(int i=a;i<=b;i++)
#define ll long long int
#define pb(a) push_back(a)
#define vi vector<int>
#define ii pair<int,int>
#define iii pair<bool, pair<int,int> >
#define mp(a,b) make_pair(a,b)

using namespace std;

ll* st;
void init(int n){
  st = new ll[4*n];
  FOR(i,4*n) st[i] = 0;
}
void update(int node,int ss,int se,int i,ll val){
  if(i>se || i<ss)return;
  if(ss==se){st[node] = val;return;}
  int mid = (ss+se)/2;
  update(node*2+1,ss,mid,i,val);
  update(node*2+2,mid+1,se,i,val);
  st[node] = max(st[node*2+1] , st[node*2+2]);
}
int get(int node,int ss,int se,ll param){
  if(st[node]+param<0){
    return -1;
  }else if(ss==se){
    return ss;
  }else{
    int mid = (ss+se)/2;
    return max(get(2*node+1,ss,mid,param),get(node*2+2,mid+1,se,param));
  }
}


int main(){
  int n;
  cin >> n;
  init(n);

  ll x[n];
  ll g[n];
  ll d[n];

  FOR(i,n)cin >> x[i] >> g[i] >> d[i];
  int rel[n];
  rel[0] = 0;
  FORE(i,1,n-1){
    rel[i] = d[i] - x[i] + x[i-1];
  }
  ll mx = 0;
  FOR(i,n){
    ll sum = 0;
    ll gc = g[i];
    if(sum + d[i]>=0)mx = max(mx,gc);
    
    FORE(j,i+1,n-1){
      sum += rel[j];
      gc+=g[j];
    if(sum + d[i] >=0)mx = max(mx,gc);
    
    }
  }
  cout << mx<<endl;



}

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