Submission #151959

#	Time	Username	Problem	Language	Result	Execution time	Memory
151959		erebos	Boxes with souvenirs (IOI15_boxes)	C++17	0 / 100	2 ms	256 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
using ll=long long int;
int n;
inline int tozero(int idx) {
	return min(idx, n-idx);
}
long long delivery(int N, int K, int L, int p[]) {
	n=N;
	ll ans=0;
	for(int i=0; i<n; ++i) {
		if(p[i]>=K) {
			ans+=(p[i]/K)*(tozero(i)*2);
			p[i]%=K;
		}
	}
	int s, e=-1, i_have=K;
	for(int i=0; i<n; ++i) {
		if(p[i]) {
			if(i_have==K) {
				s=i;
			} else if(i_have>p[i]) {
				i_have-=p[i];
				e=i;
			} else if(i_have==p[i]) {
				i_have=K;
				ans+=tozero(s)+tozero(i);
				e=-1;
			} else {
				s=i;
				i_have=i_have+K-(p[i]);
				ans+=tozero(s)+tozero(i);
				e=-1;
			}
		}
	}
	if(e!=-1) {
		ans+=tozero(s)+tozero(e);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:9:38: warning: unused parameter 'L' [-Wunused-parameter]
 long long delivery(int N, int K, int L, int p[]) {
                                      ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30