Submission #1001617

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001617		vjudge1	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	64 ms	17152 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
vector<vector<ll>> ve;
vector<ll> pr;
int bs(int n, int si, int a, int b){
    int l = si, r = n, best = -1;
    while (l <= r){
        int mid = (l + r) / 2;
        ll res = pr[mid] - pr[mid - si];
        if (res > b){
            r = mid - 1;
        }
        else if (res < a){
            l = mid + 1;
        }
        else{
            return mid;
        }
    }
    return -1;
}
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    vector<int> ans;
    int n = w.size();
    ve.push_back({0, 0});
    for (int i = 0; i < n; i++){
        ve.push_back({w[i], i});
    }
    sort(ve.begin(), ve.end());
    pr.assign(n + 1, 0);
    for (int i = 1; i <= n; i++){
        pr[i] = pr[i - 1] + ve[i][0];
    }
    for (int i = 1; i <= n; i++){
        int res = bs(n, i, l, u);
        if (res != -1){
            for (int j = res - i + 1; j <= res; j++){
                ans.push_back(ve[j][1]);
            }
            sort(ans.begin(), ans.end());
            return ans;
        }
    }
    return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'int bs(int, int, int, int)':
molecules.cpp:8:24: warning: unused variable 'best' [-Wunused-variable]
    8 |     int l = si, r = n, best = -1;
      |                        ^~~~

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