Submission #219523

#	Time	Username	Problem	Language	Result	Execution time	Memory
219523		infinite_iq	Robots (IOI13_robots)	C++14	76 / 100	3081 ms	42176 KiB

robots

#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
using namespace std;
#define sqr 400
#define mid (l+r)/2
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define ins insert
#define era erase
#define C continue
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define mset multiset
typedef long long ll;
typedef short int si;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pi> vpi;
typedef vector<pll> vpll;
const ll mod=1e9+7;
const ll inf= 4e18;
const ld pai=acos(-1);
#include "robots.h"
int szw,szl,n;
int wl[100009],sl[100009],done[1000009];
pi r[1000009];
int check ( int x ) {
        mem( done , 0 ) ;
        set<pi>s;
        int j = 0 ;
        for ( int i = 0 ;i < szw ;i ++ ) {
                while ( j < n && r[j].fi<wl[i] ) {
                        s.ins({r[j].se,j});
                        j ++ ;
                }
                vpi ret;
                int X = x ;
                if ( s.size() == 0 ) C ;
                for ( auto it = (--s.end()) ; ; it -- ){
                        if ( !X ) break;
                        ret.pb( *it ) ;
                        X -- ;
                        if ( it == s.begin() ) break;
                }
                for ( auto u :ret ) {
                        done[u.se] = 1 ;
                        s.era ( u ) ;
                }
        }
        s.clear() ;
        for ( int i =0 ;i < n ;i ++ ) {
                if ( done [i] ) C ;
                s.ins ( { r[i].se , i } ) ;
        }
        for ( int i = 0 ; i < szl ;i ++ ) {
                vpi ret;
                int X = x ;
                if ( s.size() == 0 ) break;
                for ( auto it = (--s.end()) ; ; it -- ){
                        if ( it->fi >= sl[i] ) break;
                        if ( !X ) break;
                        ret.pb( *it ) ;
                        X -- ;
                        if ( it == s.begin() ) break;
                }
                for ( auto u :ret ) {
                        done[u.se] = 1 ;
                        s.era ( u ) ;
                }
        }
        if ( s.size() ) return 0 ;
        return 1 ;
}
int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
        szw=A , szl = B , n = T ;
        for ( int i =0 ;i < n ;i ++ ) {
                r[i]= { W[i] , S[i] } ;
        }
        for ( int i =0 ;i < szw ;i ++ ){
                wl[i] = X[i];
        }
        for ( int i =0 ;i < szl ;i ++ ){
                sl[i] = Y[i];
        }
        sort ( wl , wl+szw ) , sort ( sl , sl+szl ) , reverse( sl , sl+szl ) ,sort ( r , r+n ) ;
        int l = 0 , r = n +1 ;
        while ( r - l > 1 ) {
                if ( check ( mid ) ) r = mid;
                else l = mid;
        }
        if ( r == n+1 ) return -1 ;
        return r ;
}

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