Submission #498497

#	Time	Username	Problem	Language	Result	Execution time	Memory
498497		beksultan04	Divide and conquer (IZhO14_divide)	C++14	100 / 100	121 ms	4704 KiB

divide

#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define int long long
#define pii pair<int,int>
#define ret return
#define fr first
#define sc second
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin(),s.rend()
#define nosol puts("-1");
#define pb push_back
#define endi puts("");
const int N = 1e6+12,INF = 1e15+7;
#define ordered_set tree <int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
int p[N],der[N],g[N],x[N];

void update(int v,int l,int r,int pos,int x){
	if (l == r){
		der[v] = x;
		ret ;
	}
	int m = l+r>>1;
	if (m < pos){
		update((v<<1)+1,m+1,r,pos,x);
	}
	else update(v<<1,l,m,pos,x);
	der[v] = max(der[v<<1],der[(v<<1)+1]);
}

int get_pos(int v,int l,int r,int x){
	if (l == r)ret l;
	int m = l+r>>1;
	if (der[(v<<1)+1] >= x)ret get_pos((v<<1)+1,m+1,r,x);
	ret get_pos(v<<1,l,m,x);
}


main(){
	int n,i,a,b,ans=0;
	cin>>n;
	for (i=1;i<=n;++i){
		cin>>x[i]>>a>>b;
		g[i] = g[i-1]+a;
		p[i] = p[i-1]+b;
		update(1,1,n,i,p[i]-x[i]);
	}
	for (i=1;i<=n;++i){
		int j = get_pos(1,1,n,p[i-1]-x[i]);
		ans = max(ans,g[j]-g[i-1]);
	}
	cout <<ans;
	
}
 
 

Compilation message (stderr)

divide.cpp: In function 'void update(long long int, long long int, long long int, long long int, long long int)':
divide.cpp:28:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   28 |  int m = l+r>>1;
      |          ~^~
divide.cpp: In function 'long long int get_pos(long long int, long long int, long long int, long long int)':
divide.cpp:38:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |  int m = l+r>>1;
      |          ~^~
divide.cpp: At global scope:
divide.cpp:44:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   44 | main(){
      | ^~~~

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