Submission #450343

#	Time	Username	Problem	Language	Result	Execution time	Memory
450343		JovanB	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	671 ms	386072 KiB

boxes

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#include "boxes.h"
 
ll niz1[10000005];
ll dp1[10000005];
ll niz2[10000005];
ll dp2[10000005];
ll n;
 
long long delivery(int N, int K, int L, int p[]){
    ll l = L;
    ll k = K;
    n = N;
    for(ll i=0; i<N; i++){
        if(!p[i]) continue;
        niz1[i+1] = p[i];
        niz2[i+1] = p[i];
    }
    reverse(niz2+1, niz2+n+1);
    ll cost = 0;
    ll lcost = 0;
    for(ll i=n; i>=1; i-=k){
        lcost += 2*niz1[i];
    }
    cost = lcost;
    for(int i=1; i<=n; i++){
        if(i-k >= 0) dp1[i] += dp1[i-k];
        dp1[i] += 2*niz1[i];
    }
    for(int i=1; i<=n; i++){
        if(i-k >= 0) dp2[i] += dp2[i-k];
        dp2[i] += 2*(l-niz2[i]);
    }
    for(int i=0; i<=n; i++){
        int ost = n-k-i;
        if(ost >= 0) cost = min(cost, l+dp1[i]+dp2[ost]);
        cost = min(cost, dp1[i]+dp2[n-i]);
    }
    return min(cost, lcost);
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:38:22: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   38 |         int ost = n-k-i;
      |                   ~~~^~

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