Submission #105174

#	Time	Username	Problem	Language	Result	Execution time	Memory
105174		ly20	Boxes with souvenirs (IOI15_boxes)	C++14	10 / 100	3 ms	384 KiB

boxes

#include<bits/stdc++.h>
using namespace std;
#define debug(args...) //fprintf(stderr,args)
const int MAXN=11234567;
long long ida[MAXN],volta[MAXN];
int vlt[MAXN];
long long delivery(int n,int k,int l,int id[])
{
	long long resp=MAXN*1123456789LL;
	for(int i=n-1;i>=0;i--)
	{
		vlt[n-i-1]=id[i];
	}
	for(int i=0;i<n;i++)
	{
		long long p=2*id[i];
		if(p>l)p=l;
		if(i<k)ida[i]=p;
		else ida[i]=ida[i-k]+p;
		debug("ida[%d]=%lld\n",i,ida[i]);
	}
	for(int i=0;i<n;i++)
	{
		long long p=2*((long long)l-(long long)vlt[i]);
		if(p>l)p=l;
		if(i<k)volta[i]=p;
		else volta[i]=volta[i-k]+p;
		debug("vlt[%d]=%lld\n",n-i-1,volta[i]);
	}
	resp=min(resp,(volta[n-1],ida[n-1]));
	for(int i=0;i<n-1;i++)
	{
		int v=n-i-2;
		debug("ida=%d volta=%d\n",i,v);
		resp=min(resp,ida[i]+volta[v]);
	}
	return resp;
}
/*int ps[MAXN];
int main()
{
	int n,k,l;
	scanf("%d %d %d",&n,&k,&l);
	for(int i=0;i<n;i++)
	{
		scanf("%d",&ps[i]);
	}
	printf("%lld\n",delivery(n,k,l,ps));
}*/

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:30:26: warning: left operand of comma operator has no effect [-Wunused-value]
  resp=min(resp,(volta[n-1],ida[n-1]));
                 ~~~~~~~~~^

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