Submission #420138

#	Time	Username	Problem	Language	Result	Execution time	Memory
420138		ismoilov	Boxes with souvenirs (IOI15_boxes)	C++14	20 / 100	1 ms	300 KiB

boxes

#include "boxes.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define IOS ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
#define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
#define fm(a,i,c) for(int (a) = (i); (a) > (c); (a)--)
#define fmm(a,i,c) for(int (a) = (i); (a) >= (c); (a)--)

ll delivery(int n, int k, int L, int p[]) {
	vector <ll> a, b;
	ll ans = 0, l = L;
	fp(i,0,n){
		if(p[i] <= l-p[i])
			a.push_back(p[i]*2);
		else
			b.push_back((l-p[i])*2);
	}
	sort(all(a));
	sort(all(b));
	ll x = k-1;
	while(x < a.size())
		ans += a[x], x += k;
	x = k-1;
	while(x < b.size())
		ans += b[x], x += k;
	ll aa = 0, bb = 0;
	if(a.size() % k != 0)
		aa = a[a.size()-1];
	if(b.size() % k != 0)
		bb = b[b.size()-1];
	ans += min(l, aa+bb);
	ll ans1 = 0;
	x = a.size()-1;
	while(x >= 0)
		ans1 += a[x], x -= k;
	x = b.size()-1;
	while(x >= 0)
		ans1 += b[x], x -= k;
	if(a.size() % k > 0)
		ans1 += a[a.size()%k-1];
	if(b.size() % k > 0)
		ans1 += b[a.size()%k-1];
	return min(ans1, ans);
}

Compilation message (stderr)

boxes.cpp: In function 'll delivery(int, int, int, int*)':
boxes.cpp:7:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
      |                           ^
boxes.cpp:15:2: note: in expansion of macro 'fp'
   15 |  fp(i,0,n){
      |  ^~
boxes.cpp:24:10: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  while(x < a.size())
      |        ~~^~~~~~~~~~
boxes.cpp:27:10: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  while(x < b.size())
      |        ~~^~~~~~~~~~

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