Submission #714495

#	Time	Username	Problem	Language	Result	Execution time	Memory
714495		europium	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <numeric>
#include <cmath>
#include<iterator>
#include <set>
#include <map>
#include <math.h>
#include <iomanip>
#include <unordered_set>
#include <queue>
#include <climits>
#include "molecules.h"

using namespace std;
using ll = long long;

vector<ll> ps;
ll sum(ll l, ll r){
    return ps[r + 1] - ps[l];
}

vector<int> find_subset(int a, int b, vector<int> w) {
    ll n = w.size();
    ps.resize(n + 1);

    vector<pair<ll,ll>> pos(n);

    for (ll i = 0; i < n; i++){
        pos[i].first = w[i];
        pos[i].second = i;
    }

    sort(pos.begin(), pos.end());

    // init ps
    for (ll i = 0; i < n; i++){
        ps[i + 1] = ps[i] + pos[i].first;
    }

    for (ll k = 0; k < n; k++){
        ll l = 0, r = n - k - 1, mid, wsum;

        // mid = l + (r - l + 1) / 2;
        // wsum = sum(mid, mid + k);
        //
        // if (a <= wsum && wsum <= b){
        //     vector<ll> ans;
        //     for (ll j = mid; j <= mid + k; j++) ans.push_back(pos[j].second);
        //     return ans;
        // }

        while (l <= r) {
            mid = l + (r - l) / 2;

            // cout << "BLR " << l << ' ' << r << '\n';
            // cout << mid << '\n';

            wsum = sum(mid, mid + k);
            // cout << k << ' '  << wsum << '\n';

            if (wsum < a) l = mid + 1;
            else if (wsum > b) r = mid - 1;
            else {
                vector<ll> ans;
                for (ll j = mid; j <= mid + k; j++) ans.push_back(pos[j].second);
                return ans;
            }

            // cout << "ALR " << l << ' ' << r << '\n';
        }
    }

    return vector<int>(0);
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:69:24: error: could not convert 'ans' from 'vector<long long int>' to 'vector<int>'
   69 |                 return ans;
      |                        ^~~
      |                        |
      |                        vector<long long int>