Submission #498457

#	Time	Username	Problem	Language	Result	Execution time	Memory
498457		tmn2005	Divide and conquer (IZhO14_divide)	C++17	17 / 100	1 ms	332 KiB

divide

#include<bits/stdc++.h>
using namespace std;

typedef long long ll;

#define ar array
#define fr first
#define sc second

#define vec vector
#define ret return

#define ins insert
#define mk make_pair
#define pb push_back
#define pf push_front
#define pob pop_back
#define pof pop_back

#define int long long

#define pii pair<int,int>

#define all(s) s.begin(), s.end()
#define allr(s) s.rbegin(), s.rend()

#define NeedForSpeed ios::sync_with_stdio(0),cin.tie(0);
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
const int N=1e6+12,INF=1e9,mod = 1e9+7;
bool iswowel(char n){ n = toupper(n); if(n == 'A' || n == 'O' || n == 'U' || n == 'E' || n == 'I') return true; else return false;}
int n,m,k,x,y,l,r,o,ans,res,ok,mx,mn = INF;
int a[N],b[N],c[N];
map<int,int>dp,pr;

main(){
	NeedForSpeed
    cin>>n;
    for(int i=1; i<=n; i++){
    	cin>>a[i]>>b[i]>>c[i];
	}
	for(int i=1; i<=n; i++){
		dp[i] = dp[i-1] + b[i];
		pr[i] = pr[i-1] + c[i];
	}
	for(int i=1; i<=n; i++){
		l = 1, r = i+1;
		while(l + 1 < r){
			int m = l + r >> 1;
			if(pr[i] - pr[m-1] >= a[i] - a[m])r = m;
			else l = m;
		}
		if(pr[i] - pr[l-1] >= a[i] - a[l])r = l;
		res = max(res, dp[i] - dp[r-1]);
	}
	cout<<res;
	return 0;
}

Compilation message (stderr)

divide.cpp:35:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   35 | main(){
      | ^~~~
divide.cpp: In function 'int main()':
divide.cpp:48:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   48 |    int m = l + r >> 1;
      |            ~~^~~

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