Submission #203077

#	Time	Username	Problem	Language	Result	Execution time	Memory
203077		cheetose	Coin Collecting (JOI19_ho_t4)	C++11	0 / 100	27 ms	31868 KiB

joi2019_ho_t4

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) { ll ret = 1; for (; b; b >>= 1, a = (a*a) % MMM)if (b & 1)ret = (ret*a) % MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };

Pll p[200005];
ll d[2005][2005],cost[2005][2005];
ll res(int i, int j, int x)
{
	return min(abs(p[i].X - x) + abs(p[i].Y - 1) + abs(p[j].X - x) + abs(p[j].Y - 2), abs(p[i].X - x) + abs(p[i].Y - 2) + abs(p[j].X - x) + abs(p[j].Y - 1));
}
int n;
ll go(int L, int R)
{
	if (L + 1 == R)return cost[L][R];
	ll &ret = d[L][R];
	if (~ret)return ret;
	ret = cost[L][R];
	fup(i, L + 2, R - 1,2)ret = min(ret, go(L, i - 1) + go(i, R));
	return ret;
}
int main() {
	MEM_1(d);
	scanf("%d", &n);
	if (n > 1000)return !printf("-1");
	n <<= 1;
	fup(i, 0, n-1, 1)scanf("%lld%lld", &p[i].X, &p[i].Y),p[i].X--;
	sort(p, p + n);
	fup(i, 0, n - 1, 2)cost[i][i + 1] = res(i, i + 1, i / 2);
	fup(i, 1, n - 2, 2)
	{
		ll tmp = 0;
		fup(j, i, n - 2, 2)
		{
			tmp += res(j, j + 1, (j + 1) / 2);
			cost[i - 1][j + 2] = tmp + res(i - 1, j + 2, i / 2);
		}
	}
	printf("%lld\n", go(0, n - 1));
} 

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:81:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
joi2019_ho_t4.cpp:84:54: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fup(i, 0, n-1, 1)scanf("%lld%lld", &p[i].X, &p[i].Y),p[i].X--;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63