Submission #1002828

#	Time	Username	Problem	Language	Result	Execution time	Memory
1002828		Juan	Autobahn (COI21_autobahn)	C++17	50 / 100	1 ms	600 KiB

autobahn

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define pii pair<int,int>
const int maxn = 1e3+5;

int sum_vermelha[maxn], sum_azul[maxn], p[maxn];

int main(){
	int n,k,x; cin >> n >> k >> x;
	for(int i=0; i<n; i++){
		int l,t,r; cin >> l >> t >> r;
		sum_azul[l]++, sum_azul[r+1]--;
		if(t<r-l+1){
			sum_vermelha[l+t]++;
			sum_vermelha[r+1]--;
		}
	}

	for(int i=1; i<=1000; i++){
		sum_azul[i] += sum_azul[i-1];
		sum_vermelha[i] += sum_vermelha[i-1];
	}

	for(int i=1; i<=1000; i++){
		if(sum_azul[i]<k) sum_vermelha[i]=0;
	}

	int ans=0;
	for(int i=1; i<=1000; i++){
		p[i] = p[i-1]+sum_vermelha[i];
		ans = max(ans,p[i]-p[max(0,i-x)]);
	}

	cout << ans << '\n';
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50