Submission #794772

#	Time	Username	Problem	Language	Result	Execution time	Memory
794772		bane	Detecting Molecules (IOI16_molecules)	C++17	31 / 100	43 ms	65536 KiB

molecules

#include<bits/stdc++.h>

#include "molecules.h"

using namespace std;
int dp[10000][10000], pre[10000][10000];
vector<int> find_subset(int l, int u, vector<int> w) {
    int n = (int)w.size();

    for (int i = 1; i <= n; i++){
        for (int j = 0; j <= u; j++){
            dp[i][j] = dp[i - 1][j];
            pre[i][j] = pre[i - 1][j];
        }
        if (w[i - 1] <= u){
            dp[i][w[i - 1]] = i;
            if (w[i - 1] >= l){
                return {i-1};
            }
            pre[i][w[i - 1]] = (int)1e9;
        }
        if (w[i - 1] == 0)continue;
        for (int j = 1; j + w[i-1] <= u; j++){
            if (dp[i-1][j]){
                dp[i][j + w[i-1]] = i;
                pre[i][j + w[i - 1]] = dp[i-1][j];
            }
            if (dp[i][j + w[i-1]] && j + w[i-1] >= l && j + w[i-1] <= u){
                int W = j + w[i - 1];
                vector<int>ans;
                while(i != (int)1e9){
                    ans.push_back(i-1);
                    i = pre[i][W];
                    W -= w[ans.back()];
                    
                }
                return ans;
            }
        }
    }
    return std::vector<int>(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