Submission #564661

#	Time	Username	Problem	Language	Result	Execution time	Memory
564661		myrcella	Boxes with souvenirs (IOI15_boxes)	C++17	20 / 100	72 ms	156932 KiB

boxes

//by szh
#include<bits/stdc++.h>
#include "boxes.h"

using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

const int maxn = 1e7+10;
ll pre[maxn],suf[maxn];

long long delivery(int N, int K, int L, int p[]) {
	
	memset(pre,0,sizeof(pre));
	memset(suf,0,sizeof(suf));
	
	rep(i,0,N) {
		pre[i] = min(p[i]*2,L);
		int tmp = i%K+1;
		if (i!=0) pre[i] += pre[i-tmp];
	}
	
	for(int i=N-1;i>=0;i--) {
		suf[i] = min((L-p[i])*2,L);
		int tmp = (N-1-i)%K+1;
		if (i!=N-1) suf[i] += suf[i+tmp];
	}
	
	ll ans = min(suf[0],pre[N-1]);
	rep(i,0,N-1) ans = min (ans,pre[i]+suf[i+1]);
    return ans;
}

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