Submission #897901

#	Time	Username	Problem	Language	Result	Execution time	Memory
897901		ByeWorld	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	423 ms	212280 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define pb push_back
using namespace std;
typedef pair<ll,ll> pii;
const ll MAXN = 1e7+10;
const ll INF = 2e18+10;

ll n, k, l;
ll a[MAXN];
ll ans = INF, le = -1, ri = -1;
vector <int> vec;

long long delivery(int N, int K, int L, int p[]) {
    n = N; k = K; l = L; 
    for(int i=0; i<n; i++){
    	a[i+1] = p[i]; 
    	if(p[i] <= l/2) le = i+1;
    }
    for(int i=n; i>=1; i--){
    	if(p[i] >= l/2) ri = i;
    }

    //cout << n << ' ' << k << ' ' << a[1] << " p\n";

    ll nw = 0, use = le; 
    if(le==-1) use = ri;
	for(int i=max(0ll, use-k); i<=min(n, use+k); i++){ // paling terakhirnya ada di i 
		nw = 0;
		for(int j=i; j>=1; j-=k){
			if(a[j] <= l/2) nw += 2*a[j];
			else nw += l;
		}
		for(int j=i+1; j<=n; j+=k){
			if(a[j] <= l/2) nw += l;
			else nw += 2*(l-a[j]);

		}
		ans = min(ans, nw);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:23:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   23 |     for(int i=n; i>=1; i--){
      |               ^
boxes.cpp:31:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   31 |  for(int i=max(0ll, use-k); i<=min(n, use+k); i++){ // paling terakhirnya ada di i
      |            ~~~^~~~~~~~~~~~
boxes.cpp:33:23: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   33 |   for(int j=i; j>=1; j-=k){
      |                      ~^~~
boxes.cpp:37:25: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   37 |   for(int j=i+1; j<=n; j+=k){
      |                        ~^~~

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