Submission #1001354

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001354		Br3ad	Detecting Molecules (IOI16_molecules)	C++17	0 / 100	1 ms	360 KiB

molecules

#include <iostream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <functional>
#include <numeric>
#include <cstring>
#include <string>
#include <cmath>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>

using namespace std;
#define ll long long
#define ull unsigned long long
#define f first
#define s second
#define PF push_front
#define PB push_back
#define MP make_pair
#define max(a, b) ((a > b)? a : b)
#define min(a, b) ((a < b)? a : b)
#define max3(a, b, c) max(max(a, b), c)
#define min3(a, b, c) min(min(a, b), c)

const int N = 2e5 + 5;
const int M = 1e9 + 7; 
const int inf = 0x3f3f3f3f;
const ll int INF = 1e18;

vector<int> find_subset(int l, int u, vector<int> w){
    // DP may pass O(NU)
    const int MAXN = 1e4 + 5;

    vector<int> dp(MAXN, false), parent(MAXN, -1);
    dp[0] = true;

    int ans = -1;
    for(int i = 0; i < w.size() && ans == -1; i++){
        for(int j = MAXN-1; j >= w[i] && ans == -1; j--){
            if(dp[j]) continue;
            dp[j] |= dp[j - w[i]];
            if(dp[j]) parent[j] = i;
            if(dp[j] && j >= l && j <= u) ans = j;
        }
    }

    vector<int> v;
    for(int cur = ans; cur > 0; cur -= w[parent[cur]]){
        v.PB(parent[cur] + 1);
    }

    if(v.empty()) v.PB(-1);
    
    return v;
}

// int main(){
    
//     ios::sync_with_stdio(false);
//     cin.tie(NULL);
    
//     // ifstream cin();
//     // ofstream cout();
    
//     vector<int> temp;
//     // temp = find_subset(15, 17, {6, 8, 8, 7});
//     // temp = find_subset(14, 15, {5, 5, 6, 6});
//     temp = find_subset(10, 20, {15, 17, 16, 18});

//     for(int i : temp){
//         cout << i << ' ';
//     }
    
// }

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i = 0; i < w.size() && ans == -1; i++){
      |                    ~~^~~~~~~~~~

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