제출 #372405

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
372405		arwaeystoamneg	선물상자 (IOI15_boxes)	C++17	50 / 100	48 ms	17772 KiB

boxes

#include "boxes.h"
/*
ID: awesome35
LANG: C++14
TASK: vans
*/
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<unordered_set>
#include<unordered_map>
#include<chrono>

using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpi;
typedef vector<pair<ll, ll>> vpll;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

#define pb push_back
#define mp make_pair
#define rsz resize
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define f first
#define s second
#define cont continue
#define endl '\n'
#define ednl '\n'
#define test int testc;cin>>testc;while(testc--)
#define pr(a, b) trav(x,a)cerr << x << b; cerr << endl;
#define message cout << "Hello World" << endl;
//const int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 }; // for every grid problem!!
const ll linf = 4000000000000000000LL;
const ll inf = 1000000007;//998244353
const ld pi = 3.1415926535;

void pv(vi a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vll a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vector<vi>a) {
	F0R(i, sz(a)) { cout << i << endl; pv(a[i]); cout << endl; }
}void pv(vector<vll>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); }cout << endl; }void pv(vector<string>a) { trav(x, a)cout << x << endl; cout << endl; }
void setIO(string s) {
	ios_base::sync_with_stdio(0); cin.tie(0);
	if (sz(s))
	{
		freopen((s + ".in").c_str(), "r", stdin);
		if (s != "ioi")
			freopen((s + ".out").c_str(), "w", stdout);
	}
}
const int MAX = 100;
int n, k, L;
vi a;
ll sub1()
{
	ll ans = 0;
	trav(x, a)
	{
		ans += min(x, L - x);
	}
	ans *= 2;
	return ans;
}
ll sub2()
{
	int ans = inf;
	ans = L;
	ans = min(ans, 2 * a[n - 1]);
	ans = min(ans, 2 * (L - a[0]));
	F0R(i, n - 1)
	{
		ans = min(ans, 2 * (a[i] + L - a[i + 1]));
	}
	return ans;
}
int popcount(int a)
{
	int count = 0;
	while (a)
	{
		count += (a & 1);
		a >>= 1;
	}
	return count;
}
ll sub3()
{
	int total = 1 << n;
	vll dp(total, linf);
	dp[0] = 0;
	F0R(mask, total)
	{
		if (dp[mask] == linf)continue;
		F0R(nmask, total)
		{
			if (popcount(nmask) > k || popcount(nmask) == 0)continue;
			if (mask & nmask)continue;
			int cost = L;
			vi b;
			F0R(i, n)if (nmask & (1 << i))b.pb(a[i]);
			cost = min(cost, 2 * b[sz(b) - 1]);
			cost = min(cost, 2 * (L - b[0]));
			F0R(i, sz(b) - 1)
			{
				cost = min(cost, 2 * (b[i] + L - b[i + 1]));
			}
			dp[mask | nmask] = min(dp[mask | nmask], dp[mask] + cost);
		}
	}
	return dp[total - 1];
}
ll sub4()
{
	vll dp(n + 1, linf);
	dp[0] = 0;
	F0R(i, n)
	{
		FOR(j, 1, k + 1)
		{
			if (i + j > n)break;
			int cost = L;
			cost = min(cost, 2 * a[i + j - 1]);
			cost = min(cost, 2 * (L - a[i]));
			dp[i + j] = min(dp[i + j], dp[i] + cost);
		}
	}
	return dp[n];
}
ll delivery(int A, int b, int c, int* d)
{
	n = A, k = b, L = c;
	a.rsz(n);
	F0R(i, n)a[i] = d[i];
	if (n <= 1000)
	{
		if (k == 1)
		{
			return sub1();
		}
		else if (k == n)
		{
			return sub2();
		}
		else if (n <= 10)
		{
			return sub3();
		}
		return sub4();
	}
	return -1123089;
}

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In function 'int popcount(int)':
boxes.cpp:84:19: warning: declaration of 'a' shadows a global declaration [-Wshadow]
   84 | int popcount(int a)
      |                   ^
boxes.cpp:61:4: note: shadowed declaration is here
   61 | vi a;
      |    ^
boxes.cpp: In function 'void setIO(std::string)':
boxes.cpp:54:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   54 |   freopen((s + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
boxes.cpp:56:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   56 |    freopen((s + ".out").c_str(), "w", stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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