Submission #527002

#	Time	Username	Problem	Language	Result	Execution time	Memory
527002		lcs147	Detecting Molecules (IOI16_molecules)	C++98	0 / 100	1 ms	296 KiB

molecules

#include"molecules.h"
#include<bits/stdc++.h>
using namespace std;

vector<int>find_subset(int l, int r, vector<int> w) {
    if(l > r) return {};

    vector<int>id(w.size());
    iota(id.begin(), id.end(), 0);
    sort(id.begin(), id.end(), [&](int a, int b){
        return w[a] < w[b];
    });
    while(id.size() && w[id.back()] > r) id.pop_back();

    int sum = 0;
    vector<int>has_sum(r+1, -1);
    int en = -1;
    while(1) {
        if(sum != 0) {
            while(sum <= r && has_sum[sum]==-1) sum++;
        }
        if(sum > r) return {};
        if(sum >= l) {
            en = sum;
            break;
        }

        for(int i = has_sum[sum]+1; i<id.size(); i++) {
            int nsum = sum + w[id[i]];
            if(nsum > r) break;
            has_sum[nsum] = i;
        }
        sum++;
    }

    sum = en;
    vector<int>res;
    while(sum > 0) {
        int rid = id[has_sum[sum]];
        res.push_back(rid);
        sum -= w[rid];
    }
    sort(res.begin(), res.end());
    return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:28:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for(int i = has_sum[sum]+1; i<id.size(); 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