Submission #206343

#	Time	Username	Problem	Language	Result	Execution time	Memory
206343		autumn_eel	Detecting Molecules (IOI16_molecules)	C++14	19 / 100	8 ms	888 KiB

molecules

#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
#include "molecules.h"
using namespace std;

bitset<500001>bit;
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
	bit[0]=1;
	rep(i,w.size()){
		bit|=bit<<w[i];
	}
	for(int i=l;i<=u;i++){
		if(bit[i]==1){
			int x=w.size(),y=i;
			vector<int>ans;
			while(x){
				x--;
				if(y>=w[x]&&bit[y-w[x]]){
					ans.push_back(x);
					y-=w[x];
				}
			}
			assert(y==0);
			reverse(ans.begin(),ans.end());
			return ans;
		}
	}
	return {};
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:2:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define rep(i,n)for(int i=0;i<(n);i++)
                              ^
molecules.cpp:9:2: note: in expansion of macro 'rep'
  rep(i,w.size()){
  ^~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31