oj.uz

Submission #45070

# Submission time Handle Problem Language Result Execution time Memory
45070 2018-04-11T06:30:09 Z rajarshi_basu Divide and conquer (IZhO14_divide) C++14
48 / 100
 1000 ms 4208 KB 
#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 prel[n];//sum from 0 to n;
  prel[0] = rel[0];
  FORE(i,1,n-1)prel[i] = prel[i-1] + rel[i];
  ll pg[n];
  pg[0] = g[0];
  FORE(i,1,n-1)pg[i] = pg[i-1] + g[i];
 // FOR(i,n)cout << pg[i] << " ";cout<<endl;
  ll mx = 0;
  FOR(i,n){
    ll sum = 0;
    ll gc = g[i];
    if(d[i]>=0)mx = max(mx,gc);
    
    FORE(j,i+1,n-1){
      gc+=g[j];
      if(prel[j] - prel[i] + d[i] >=0)mx = max(mx,pg[j]-((i==0)?0:pg[i-1]));
    }
  }
  cout << mx<<endl;



}

Compilation message

divide.cpp: In function 'int main()':
divide.cpp:71:8: warning: unused variable 'sum' [-Wunused-variable]
     ll sum = 0;
        ^~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 2 ms 324 KB Output is correct
3 Correct 2 ms 324 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 436 KB Output is correct
7 Correct 2 ms 436 KB Output is correct
8 Correct 2 ms 512 KB Output is correct
9 Correct 2 ms 512 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 2 ms 592 KB Output is correct
12 Correct 2 ms 592 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 4 ms 604 KB Output is correct
6 Correct 5 ms 604 KB Output is correct
7 Correct 4 ms 604 KB Output is correct
8 Correct 4 ms 732 KB Output is correct
9 Correct 6 ms 732 KB Output is correct
10 Correct 6 ms 732 KB Output is correct
11 Correct 22 ms 864 KB Output is correct
12 Correct 20 ms 872 KB Output is correct

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 872 KB Output is correct
2 Correct 91 ms 1340 KB Output is correct
3 Correct 96 ms 1340 KB Output is correct
4 Execution timed out 1061 ms 4208 KB Time limit exceeded
5 Halted 0 ms 0 KB -