Submission #549926

#	Time	Username	Problem	Language	Result	Execution time	Memory
549926		Bogdan1110	Detecting Molecules (IOI16_molecules)	C++14	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>
#define FAST {ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);}
#define ll long long
#define ull unsigned long long
#define pb push_back
#define fi first
#define se second
#define ld long double
#define pii pair<int,int>
#define pll pair<long long,long long>
#define all(a) (a).begin(), (a).end()
#define mp make_pair 
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define ordered_set tree<ll, null_type,less<ll>, rb_tree_tag,tree_order_statistics_node_update>
// order_of_key -> # less than k
// find_by_order -> k-th element
// pq max element

void files() {
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif
}

const double eps = 0.00000001;
const int NMAX = 200010;
const ll inf = LLONG_MAX/2;
const ll modi = 1e9+7;

vector<int> find_subset(int l, int r, vector<int>w) {
    int n = w.size();
    vector<pll>v(n);
    for (int i = 0 ; i < n ; i++ ) {
        v[i] = {w[i],i};
    }
    sort(all(v));
    int L = 0, R = 0;
    ll sum = 0;
    vector<int>ans;
    while(R<n) {
        cout << L << ' ' << R << endl;
        if ( sum < l ) {
            sum += v[R].fi;
            R++;
            continue;
        }
        if ( sum > r ) {
            sum -= v[L].fi;
            L++;
            continue;
        }
        for (int i = L ; i < R ; i++ ) {
            ans.pb(v[i].se);
        }
        break;
    }
    sort(all(ans));
    return ans;
}

void solve () {
    int l,r;
    cin >> l >> r ;
    int n;
    cin >> n;
    vector<int>v(n);
    for (int i = 0 ; i < n ; i++ ) cin >> v[i];
    vector<int>ans = find_subset(l,r,v);
    cout << ans.size() << endl ; for (auto u : ans) cout << u << ' ';
}
int main () {
    files();
    FAST
    int t=1;
    //cin >> t;
    int i = 1;
    while(t--) {
        //cout << "Case #" << i++ << ": " ;
        solve();
    }
}   

Compilation message (stderr)

molecules.cpp: In function 'int main()':
molecules.cpp:81:9: warning: unused variable 'i' [-Wunused-variable]
   81 |     int i = 1;
      |         ^
molecules.cpp: In function 'void files()':
molecules.cpp:25:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
molecules.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cchEe1jz.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccd1oPFz.o:molecules.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status