Submission #481227

#	Time	Username	Problem	Language	Result	Execution time	Memory
481227		glome	Detecting Molecules (IOI16_molecules)	C++17	46 / 100	164 ms	1624 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;
 
vector<int> ans;


vector<vector<int>> need(1e4 + 1);


struct S {
	int b = 0;
	vector<int> ind;
};

vector<S> ok(1e4 + 1);


void dfs(int a) {
	if(a == 0) {
		return;
	}
	for (int i = 0; i<ok[a].ind.size(); i++) {
		ans.push_back(ok[a].ind[i]);
	}
	for (int u : need[a]) {
		dfs(u);
	}
}
 
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
	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].b) {
				need[j].push_back(j-i);
				ok[j].b = 1;
				(ok[j].ind).push_back(cnt);
			}
		}
		cnt++;
	}
	for (int i = l; i<=u; i++) {
		if(ok[i].b) {
			dfs(i);		
			return ans;
		}
	}
	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 'void dfs(int)':
molecules.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |  for (int i = 0; i<ok[a].ind.size(); i++) {
      |                  ~^~~~~~~~~~~~~~~~~

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