Submission #40146

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
40146	2018-01-28 07:32:53	tmwilliamlin168	Detecting Molecules (IOI16_molecules)	C++11	100 / 100	71 ms	4648 KiB

molecules

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#include <bits/stdc++.h>
#include "molecules.h"
using namespace std;
 
typedef long long ll;
 
vector<int> find_subset( int L, int U, vector<int> W){
  vector< int > ord( W.size() ), result;
  for( int i = 0; i < W.size(); ++i ){
    ord[ i ] = i;
  }
  sort( ord.begin(), ord.end(), [ & ]( int i, int j ){ return W[ i ] < W[ j ]; } );
  ll sum = 0;
  for( int lb = 0, rb = 0; lb < W.size(); ++lb ){
    while( sum < L and rb < W.size() )
      sum += W[ ord[ rb++ ] ];
    if( L <= sum and sum <= U ){
      for( int i = lb; i < rb; ++i )
        result.push_back(ord[ i ]);
      break;
    }
    if( lb < rb ) sum -= W[ ord[ lb ] ];
  }
  return result;
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:9:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for( int i = 0; i < W.size(); ++i ){
                     ^
molecules.cpp:14:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for( int lb = 0, rb = 0; lb < W.size(); ++lb ){
                               ^
molecules.cpp:15:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while( sum < L and rb < W.size() )
                           ^

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31