Submission #1042605

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042605		Zicrus	Detecting Molecules (IOI16_molecules)	C++17	9 / 100	1 ms	348 KiB

molecules

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

typedef long long ll;

vector<int> find_subset(int l, int u, vector<int> w) {
    ll tot = 0;
    ll lCnt, hCnt;
    sort(w.begin(), w.end());
    for (auto &e : w) {
        if (tot + e <= u) { tot += e; if (e == w[0]) lCnt++; }
        else {
            if (e != w[0]) hCnt++;
        }
    }
    ll sw = min(lCnt, hCnt);
    ll fin = min(tot + sw, (ll)u);
    ll used = fin - tot;
    vector<int> res;
    if (tot < l) return res;

    ll tot2 = 0;
    ll l2 = used, u2 = used;
    for (int i = 0; i < w.size(); i++) {
        if (tot2 + w[i] <= u) { tot2 += w[i]; res.push_back(i); }
        else {
            if (w[i] == w[0] && l2) { l2--; res.push_back(i); }
            else if (w[i] != w[0] && u2) { u2--; res.push_back(i); }
        }
    }
    return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for (int i = 0; i < w.size(); i++) {
      |                     ~~^~~~~~~~~~
molecules.cpp:9:14: warning: 'hCnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
    9 |     ll lCnt, hCnt;
      |              ^~~~
molecules.cpp:9:8: warning: 'lCnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
    9 |     ll lCnt, hCnt;
      |        ^~~~

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