Submission #500722

#	Time	Username	Problem	Language	Result	Execution time	Memory
500722		aryan12	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	51 ms	8204 KiB

molecules

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

bool cmp(pair<long long, long long> a, pair<long long, long long> b) {
    return a.first < b.first;
}

vector<int> find_subset(int l, int r, vector<int> w) {
    vector<pair<long long, long long> > a;
    for(long long i = 0; i < w.size(); i++) {
        a.push_back(make_pair(w[i], i));
    }
    sort(a.begin(), a.end(), cmp);
    long long left = 0, right = 0, sum = a[0].first;
    for(long long i = 1; i < a.size(); i++) {
        sum += a[i].first;
        if(sum > r) {
            break;
        }
        right = i;
    }
    vector<int> ans;
    if(sum >= l && sum <= r) {
        for(long long i = 0; i <= right; i++) {
            ans.push_back(a[i].second);
        }
    }
    else {
        int f = 0;
        sum = 0;
        left = 0, right = -1;
        int x = a.size() - 1;
        for(left = 0; left < a.size(); left++) {
            if(left != 0) sum -= a[left - 1].first;
            //cout << "right = " << right << ", a.size() - 1 = " << a.size() - 1 << ", sum + a[right + 1].first = " << sum + a[right + 1].first << ", r = " << r << "\n";
            while(right < x && sum + a[right + 1].first <= r) {
                //cout << "party all night\n";
                right++;
                sum += a[right].first;
            }
            //cout << "left = " << left << ", right = " << right << "\n";
            if(sum >= l && sum <= r) {
                f = 1;
                break;
            }
        }
        if(f == 1) {
            for(long long i = left; i <= right; i++) {
                ans.push_back(a[i].second);
            }
        }
    }
    return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:11:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(long long i = 0; i < w.size(); i++) {
      |                          ~~^~~~~~~~~~
molecules.cpp:16:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(long long i = 1; i < a.size(); i++) {
      |                          ~~^~~~~~~~~~
molecules.cpp:34:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         for(left = 0; left < a.size(); left++) {
      |                       ~~~~~^~~~~~~~~~

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