Submission #29822

#	Time	Username	Problem	Language	Result	Execution time	Memory
29822		osmanorhan	Robots (IOI13_robots)	C++14	0 / 100	0 ms	6320 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
#define all( x ) x.begin(), x.end()
#define fi first
#define se second
#define pb push_back

using namespace std;

typedef pair<int,int> ii;

vector<ii> v;
vector<int> w, s;

bool f( int n ) {
    priority_queue<int> q;
    int j = 0;
    for(int i=0;i<w.size();i++) {
        while( j < v.size() && v[j].fi < w[i] ) q.push( v[j].se ), j++;
        int tr = n;
        while( tr-- > 0 && !q.empty() ) q.pop();
    }
    while( j < v.size() ) q.push( v[j].se ), j++;
    if( q.empty() ) return 1;
    for(int i=s.size()-1;i>=0;i--) {
        if( q.top() >= s[i] ) return 0;
        int tr = n;
        while( tr-- > 0 && !q.empty() ) q.pop();
        if( q.empty() ) return 1;
    }
}

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
    for(int i=0;i<T;i++) v.pb( ii( W[i], S[i] ) );
    sort( X, X+A );
    sort( Y, Y+B );
    for(int i=0;i<A;i++) w.pb( X[i] );
    for(int i=0;i<B;i++) s.pb( Y[i] );

    //binary search
    int t = 0;
    for(int k=19;k>=0;k--)
        if( !f( t+(1<<k) ) ) t += 1<<k;
    t++;
    if( !f( t ) ) return -1;
    return t;
}

Compilation message (stderr)

robots.cpp: In function 'bool f(int)':
robots.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<w.size();i++) {
                  ^
robots.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while( j < v.size() && v[j].fi < w[i] ) q.push( v[j].se ), j++;
                  ^
robots.cpp:23:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while( j < v.size() ) q.push( v[j].se ), j++;
              ^
robots.cpp:31:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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