Submission #309340

#	Time	Username	Problem	Language	Result	Execution time	Memory
309340		Hehehe	Robots (IOI13_robots)	C++14	100 / 100	1849 ms	24364 KiB

robots

#include<bits/stdc++.h> //:3
using namespace std;
typedef long long ll;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define pi pair<int, int>
#define sz(x) (int)((x).size())
//#define int long long
#include "robots.h"

const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};

const ll inf = 2e6;
const ll mod = 1e9 + 7;
const int N = 3e6 + 11;
const ll INF64 = 3e18 + 1;
const double eps = 1e-14;
const double PI = acos(-1);

//ifstream in(".in");
//ofstream out(".out");

int A, B, T, *X, *Y, *W, *S;
pi P[N];

bool f(int m){
    priority_queue<int> q;
    int j = 0;
    for(int i = 0; i < A; i++){
        for(;j < T && P[j].ff < X[i];){
            q.push(P[j].ss);
            j++;
        }
        for(int k = 0; k < m && sz(q); k++)q.pop();
    }
    for(int i = j; i < T; i++)q.push(P[i].ss);
    for(int i = B - 1; i >= 0; i--){
        for(int j = 0; j < m && sz(q); j++){
            if(Y[i] <= q.top())return 0;
            q.pop();
        }
    }
    return (!sz(q));
}

int putaway(int AA, int BB, int TT, int XX[], int YY[], int WW[], int SS[]) {
	A = AA, B = BB, T = TT, X = XX, Y = YY, W = WW, S = SS;

	sort(X, X + A);
	sort(Y, Y + B);
	
	for(int i = 0; i < T; ++i)
		if(W[i] >= X[A - 1] && S[i] >= Y[B - 1]) return -1;

	for(int i = 0; i < T; i++){
        P[i] = {W[i], S[i]};
	}

	sort(P, P + T);

	int l = 1, r = T, ans = T;
	while(l < r){
        int mid = (l + r) >> 1;
        if(f(mid))r = mid, ans = mid;else l = mid + 1;
	}
	return l;
}

Compilation message (stderr)

robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:65:20: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
   65 |  int l = 1, r = T, ans = T;
      |                    ^~~

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