Submission #438465

#	Time	Username	Problem	Language	Result	Execution time	Memory
438465		adamjinwei	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	600 ms	221764 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
#define inf 1000000000000000007
#define mod 1000000007
#define rnd() rand_num()
#define bigrnd() dis(rand_num)
//#pragma GCC optimize("Ofast","inline","-ffast-math")
//#pragma GCC target("avx,sse2,sse3,sse4,mmx")
//#define int long long
using namespace std;
unsigned sed=std::chrono::system_clock::now().time_since_epoch().count();
mt19937 rand_num(sed);
uniform_int_distribution<long long> dis(0,inf);
template <typename T> void read(T &x){
	x=0;char ch=getchar();int fh=1;
	while (ch<'0'||ch>'9'){if (ch=='-')fh=-1;ch=getchar();}
	while (ch>='0'&&ch<='9')x=x*10+ch-'0',ch=getchar();
	x*=fh;
}
template <typename T> void write(T x) {
	if (x<0) x=-x,putchar('-');
	if (x>9) write(x/10);
	putchar(x%10+'0');
}
template <typename T> void writeln(T x) {
	write(x);
	puts("");
}
long long f[10000005],g[10000005];
long long delivery(int N,int K,int L,int positions[])
{
	for(int i=1;i<=N;++i)
		f[i]=f[max(0,i-K)]+2*positions[i-1];
	for(int i=N;i>=1;--i)
		g[i]=g[min(N+1,i+K)]+2*(L-positions[i-1]);
	long long ans=inf;
	for(int i=0;i<=N;++i)
	{
		ans=min(ans,f[i]+g[i+1]);
		if(i+K<=N) ans=min(ans,f[i]+L+g[i+K+1]);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp:11:71: warning: conversion from 'std::chrono::duration<long int, std::ratio<1, 1000000000> >::rep' {aka 'long int'} to 'unsigned int' may change value [-Wconversion]
   11 | unsigned sed=std::chrono::system_clock::now().time_since_epoch().count();
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~

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