Submission #422330

#	Time	Username	Problem	Language	Result	Execution time	Memory
422330		kym	Robots (IOI13_robots)	C++14	76 / 100	418 ms	32000 KiB

robots

#include <bits/stdc++.h>
#include "robots.h"
using namespace std;
//#define int ll 
#define FOR(i,s,e) for(ll i = s; i <= (ll)e; ++i)
#define DEC(i,s,e) for(ll i = s; i >= (ll)e; --i)
#define IAMSPEED ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
#define db(x) cerr << #x << "=" << x << "\n"
#define db2(x, y) cerr << #x << "=" << x << " , " << #y << "=" << y << "\n"
#define db3(a,b,c) cerr<<#a<<"="<<a<<","<<#b<<"="<<b<<","<<#c<<"="<<c<<"\n"
#define dbv(v) cerr << #v << ":"; for (auto ite : v) cerr << ite << ' '; cerr <<"\n"
#define dbvp(v) cerr << #v << ":"; for (auto ite : v) cerr << "{"  << ite.f << ',' << ite.s << "} "; cerr << "\n"
#define dba(a,ss,ee) cerr << #a << ":"; FOR(ite,ss,ee) cerr << a[ite] << ' '; cerr << "\n"
#define reach cerr << "LINE: " << __LINE__ << "\n";
#else
#define db(x)
#define db2(x,y)
#define db3(a,b,c)
#define dbv(v)
#define dbvp(v)
#define dba(a,ss,ee)
#define reach 
#endif
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define ll long long 
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define f first
#define s second
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define g3(x) get<3>(x)
typedef pair <ll, ll> pi;
typedef tuple<ll,ll,ll> ti3;
typedef tuple<ll,ll,ll,ll> ti4;
ll rand(ll a, ll b) { return a + rng() % (b-a+1); }
const int MOD = 1e9 + 7;
const int inf = (int)1e9 + 500;
const long long oo = (ll)1e18 + 500;
template <typename T> bool chmax(T& a, const T b) { return a<b ? a = b, 1 : 0; }
template <typename T> bool chmin(T& a, const T b) { return a>b ? a = b, 1 : 0; }
const int MAXN = 1000005;
const int MAXM = 50005;
 
ll n,x,y;
pi A[MAXN];
ll Xx[MAXM], Yy[MAXM];

bool check(ll ti) {
	priority_queue<ll,vector<ll>,greater<ll>> pot;
	multiset<pi> small;
	FOR(i,1,y)small.insert(pi(Yy[i],ti));
	int weaks=0;
	int weakidx=x;
	FOR(i,1,n) {
		while(weakidx&&Xx[weakidx]>A[i].f) {
			weaks+=ti;
			weakidx--;
		}
		if(weaks) {
			weaks--;
			pot.push(A[i].s);
			continue;
		} 
		pot.push(A[i].s);
		ll best=pot.top();
		if(small.empty())return 0;
		auto it=small.lower_bound(pi(best,inf));
		if(it==small.end())return 0;
		auto p = *it;
		p.s--;
		small.erase(it);
		if(p.s)small.insert(p);
		pot.pop();
	}
	return 1;	
}

int putaway(int _A, int _B, int _T, int _X[], int _Y[], int _W[], int _S[]) {
	x=_A,y=_B,n=_T;
	FOR(i,1,n) {
		A[i] = pi(_W[i-1], _S[i-1]);
		Xx[i]=_X[i-1];
		Yy[i]=_Y[i-1];
	}
	if(x)sort(Xx+1,Xx+x+1);
	if(y)sort(Yy+1,Yy+y+1);
	sort(A+1,A+n+1,[](pi a, pi b) {
		if(a.f==b.f)return a.s < b.s;
		else return a.f > b.f;
	});
	int lo = 0, hi = n+1;
	if(!check(hi))return -1;
	while(lo<hi-1) {
		ll mid=(lo+hi)/2;
		if(check(mid))hi=mid;
		else lo=mid;
	}
	return hi;
}

#ifdef LOCAL
#define fail(s, x...) do { \
		fprintf(stderr, s "\n", ## x); \
		exit(1); \
	} while(0)

#define MAX_A 50000
#define MAX_B 50000
#define MAX_T 500000

static int X[MAX_A];
static int Y[MAX_B];
static int W[MAX_T];
static int S[MAX_T];

int main() {
    int A, B, T, i;
	int res;

	//FILE *f = fopen("robots.in", "r");
	//if (!f)
	//	fail("Failed to open input file.");

	res = scanf("%d", &A);
	if (res != 1)
		fail("Failed to read A from input file.");
	if (A < 0 || A > MAX_A)
		fail("A is out of bounds.");

	res = scanf( "%d", &B);
	if (res != 1)
		fail("Failed to read B from input file.");
	if (B < 0 || B > MAX_B)
		fail("B is out of bounds.");

	res = scanf("%d", &T);
	if (res != 1)
		fail("Failed to read T from input file.");
	if (T < 1 || T > MAX_T)
		fail("T is out of bounds.");

	for (i = 0; i < A; i++) {
		res = scanf( "%d", &X[i]);
		if (res != 1)
		    fail("Failed to read data from input file.");
    }
	for (i = 0; i < B; i++) {
        res = scanf( "%d", &Y[i]);
        if (res != 1)
            fail("Failed to read data from input file.");
    }
	for (i = 0; i < T; i++) {
        res = scanf("%d%d", &W[i], &S[i]);
        if (res != 2)
            fail("Failed to read data from input file.");
    }
	//fclose(f);

	int answer = putaway(A, B, T, X, Y, W, S);

	printf("%d\n", answer);

	return 0;
}
#endif

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37
• Subtask 5: 0 / 10