Submission #261625

#	Time	Username	Problem	Language	Result	Execution time	Memory
261625		themax23	Detecting Molecules (IOI16_molecules)	C++17	31 / 100	4 ms	1792 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int INF = 1e9;
ll L, R, N;
vector<int> W;

int   memo[1003][103];
bool cache[1003][103];
bool     P[1003][103];

int DP(ll sum,int idx){
	if(idx > N) return 0;
	if(sum >=L && sum <= R) return sum;
    if(sum > R) return 0;
	if(cache[sum][idx])
		return memo[sum][idx];
	cache[sum][idx] = true;
	
	ll ans1 = DP(sum + W[idx], idx+1);
	ll ans2 = DP(sum,idx+1);
	ll ans = 0;
	if(ans1 >= L && ans1 <= R){P[sum][idx] = true; ans = ans1;}
	else if(ans2 >= L && ans2 <= R)  {ans = ans2;}
	memo[sum][idx] = ans;
	return ans;
	
}


std::vector<int> find_subset(int l, int u, std::vector<int> w) {
	L = l, R = u, N = (int) w.size();
	W = w;
	vector<int> sub;
	ll ans = DP(0,0);
	for(int i = 0, s = 0; i < N; i++){
		if(P[s][i]) {sub.push_back(i); s += w[i];}
		//deb(P[s][i]);
	}
    return sub;

}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:36:5: warning: unused variable 'ans' [-Wunused-variable]
  ll ans = DP(0,0);
     ^~~

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