Submission #30523

#	Time	Username	Problem	Language	Result	Execution time	Memory
30523		laptop_recai	Boxes with souvenirs (IOI15_boxes)	C++98	100 / 100	581 ms	171048 KiB

boxes

//Bismillahirrahmanirrahim
#include<bits/stdc++.h>
#include<bits/stdc++.h>
#define fori(A,B,C) for(int A=B; A<C; ++A)
#define ford(A,B,C) for(int A=B; A>=C; --A)
#define fi          first
#define se          second
#define pb          push_back
#define pbp(A,B)    pb({A,B})
#define pp(A,B)     push({A,B})
using namespace std;
typedef long long       ll;
const ll linf = 1e18;
vector < ll > l, r;
#include "boxes.h"

long long delivery(int N, int k, int L, int p[]) {
	fori(i,0,N) {
		if(p[i] <= L>>1)
			l.pb(p[i]<<1);
		else
			r.pb((L - p[i])<<1);
	}
	reverse(r.begin(), r.end());
	int lsz = l.size();
	int rsz = r.size();
	fori(i,k,lsz)
		l[i] += l[i - k];
	fori(i,k,rsz)
		r[i] += r[i - k];
    ll ans = (lsz ? l.back() : 0) + (rsz ? r.back() : 0);
	for(int i = 0; i <= k; i++) {
		ans = min(ans, (i < l.size() ? l[l.size() - 1 - i] : 0) + ((k-i) < r.size() ?  r[r.size() - 1 - (k-i)] : 0) + L);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:25:18: warning: conversion to 'int' from 'std::vector<long long int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
  int lsz = l.size();
            ~~~~~~^~
boxes.cpp:26:18: warning: conversion to 'int' from 'std::vector<long long int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
  int rsz = r.size();
            ~~~~~~^~
boxes.cpp:33:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   ans = min(ans, (i < l.size() ? l[l.size() - 1 - i] : 0) + ((k-i) < r.size() ?  r[r.size() - 1 - (k-i)] : 0) + L);
                   ~~^~~~~~~~~~
boxes.cpp:33:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   ans = min(ans, (i < l.size() ? l[l.size() - 1 - i] : 0) + ((k-i) < r.size() ?  r[r.size() - 1 - (k-i)] : 0) + L);
                                                              ~~~~~~^~~~~~~~~~

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