Submission #481219

#	Time	Username	Problem	Language	Result	Execution time	Memory
481219		glome	Detecting Molecules (IOI16_molecules)	C++17	31 / 100	1090 ms	27204 KiB

molecules

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
 
#include "molecules.h"
 
#include<bits/stdc++.h>
 
using namespace std;
 
struct S {
	int b = 0;
	vector<int> ind;
};
 
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
	int s = 0;
   	for (int i : w) {
	   	s += i;
	}
  	if(s == w.size()) {
      if(l > w.size()) {
        return vector<int> (0);
      }
      vector<int> ans;
      for (int i = 0; i<l; i++) {
        ans.push_back(i);
      }
      return ans;
    }
	vector<S> ok(10000+1);
	ok[0].b = 1;
	int cnt = 0;
	for (int i : w) {
		for (int j = u; j>=i; j--) {
			if(ok[j-i].b) {
				ok[j].ind = ok[j-i].ind;
				ok[j].b = 1;
				(ok[j].ind).push_back(cnt);
			}
		}
		cnt++;
	}
	vector<int> ans;
	for (int i = l; i<=u; i++) {
		if(i > s) {
			break;
		}
		if(ok[i].b) {
			return ok[i].ind;
		}
	}
	return ans;
 
}

Compilation message (stderr)

molecules.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
molecules.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:21:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |    if(s == w.size()) {
      |       ~~^~~~~~~~~~~
molecules.cpp:22:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |       if(l > w.size()) {
      |          ~~^~~~~~~~~~

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