Submission #141607

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
141607	2019-08-08T14:19:36 Z	eggag32	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KB

molecules

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#include "molecules.h"
//#include "grader.cpp"
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define debug(x) cerr << #x << ": " << x << endl;
#define debug2(x, y) debug(x) debug(y);
#define repn(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define rep(i, a) for(int i = 0; i < (int)(a); i++)
#define all(v) v.begin(), v.end() 
#define mp make_pair
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define endl '\n'

template<class T> T gcd(T a, T b){ return ((b == 0) ? a : gcd(b, a % b)); }

vi find_subset(int l, int u, vi w) {
	int sum = 0;
	vi ans;
	vi emp(0);
	vector<pi> w1;
	rep(i, n) w1[i] = {w[i], i};
	sort(all(w1));
	rep(i, w.size()){
		ans.pb(w1[i].se);
		sum += w1[i].fi;
		if(sum > u) return emp;
		if(sum >= l) return ans;
	}
	if(sum < l) return emp;
	return ans;
}

/*
Things to look out for:
	- Integer overflows
	- Array bounds
	- Special cases
Be careful!
*/

Compilation message

molecules.cpp: In function 'vi find_subset(int, int, vi)':
molecules.cpp:31:9: error: 'n' was not declared in this scope
  rep(i, n) w1[i] = {w[i], i};
         ^
molecules.cpp:14:44: note: in definition of macro 'rep'
 #define rep(i, a) for(int i = 0; i < (int)(a); i++)
                                            ^