Submission #453654

#	Time	Username	Problem	Language	Result	Execution time	Memory
453654		ponytail	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<int> find_subset(int l, int u, vector<int> w){
    ll n,l,u;
    cin >> n >> l>>u;
    pair<ll,ll> w[n];
    bool used[n];
    ll tot_sum=0;
    for(int i=0;i<n;i++)cin>>w[i].first;
    for(int i=0;i<n;i++)w[i].second=i;
    for(int i=0;i<n;i++)tot_sum+=w[i].first;
    for(int i=0;i<n;i++)used[i]=false;
    sort(w,w+n);
    ll curr_sum=0, pt=0, nani=0;
    for(int i=0;i<n;i++){
        curr_sum+=w[i].first;
        if(u<curr_sum){
            curr_sum-=w[i].first;
            pt=i;
            break;
        }
        used[i]=true;
        nani++;
        if(l<=curr_sum&&curr_sum<=u){
            vector<int> ans;
            for(int j=0;j<n;j++){
                if(used[j]) ans.push_back(w[j].second);
            }
            return ans;
        }
    }
    for(int i=0;i<min(n-pt,pt);i++){
        curr_sum-=w[i].first;
        used[i]=false;
        curr_sum+=w[n-i-1].first;
        used[n-i-1]=true;
        if(l<=curr_sum&&curr_sum<=u){
            break;
        }
    }
    if(l<=curr_sum&&curr_sum<=u){
        vector<int> ans;
        for(int j=0;j<n;j++){
            if(used[j]) ans.push_back(w[j].second);
        }
        return ans;
    }
    else{
        return {};
    }
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:6:10: error: declaration of 'll l' shadows a parameter
    6 |     ll n,l,u;
      |          ^
molecules.cpp:5:29: note: 'int l' previously declared here
    5 | vector<int> find_subset(int l, int u, vector<int> w){
      |                         ~~~~^
molecules.cpp:6:12: error: declaration of 'll u' shadows a parameter
    6 |     ll n,l,u;
      |            ^
molecules.cpp:5:36: note: 'int u' previously declared here
    5 | vector<int> find_subset(int l, int u, vector<int> w){
      |                                ~~~~^
molecules.cpp:8:17: error: declaration of 'std::pair<long long int, long long int> w [n]' shadows a parameter
    8 |     pair<ll,ll> w[n];
      |                 ^
molecules.cpp:5:51: note: 'std::vector<int> w' previously declared here
    5 | vector<int> find_subset(int l, int u, vector<int> w){
      |                                       ~~~~~~~~~~~~^