Submission #685695

#	Time	Username	Problem	Language	Result	Execution time	Memory
685695		Bliznetc	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC target("avx2")

using namespace std;

#define pb push_back
#define sz size()
#define all(x) x.begin(), x.end()
#define F first
#define S second
#define int long long

typedef pair < int, int > pii;
typedef vector < int >  vi;
typedef vector < vi >  vvi;

vi find_subset(int l, int u, vi w) {
    int n = w.sz;
    pii a[n + 7];
    int sum = 0;
    for (int i = 1; i <= n; i++) {
        a[i]= {w[i - 1], i};
        sum += a[i].F;
    }

    sort (a + 1, a + n + 1);

    if (sum < l) {
        return {};
    }
    int r = u;
    if (a[1].F > u) {
        return {};
    }

    int cur = 0;
    int ptr = 0;
    vi result;
    for (int i = 1; i <= n; i++) {
        if (cur + a[i].F >= l) {
            if (cur + a[i].F <= r) {
                cur += a[i].F;
                result.pb(a[i].S);
            }
            break;
        }
        cur += a[i].F;
        result.pb(a[i].S);
    }

    if (cur < l) {
        for (int i = 0; i < result.sz; i++) {
            if (cur - a[i].F + a[n].F <= r) {
                result[i] = a[n].S;
                break;
            }
        }
    }
    if (cur >= l && cur <= r) {
        return result;
    }
    return {};
}

/*
void solve(){

}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int t = 1;
    int l = 15, u = 17;
    int a[4] = {6, 8, 8, 7};
    int result[10];
    int pos = find_subset(l, u, a, 4, result);
    cout << pos;
//    cin >> t;
//    while (t--) {
//        solve();
//        cout << "\n";
//    }
}

*/

Compilation message (stderr)

molecules.cpp: In function 'vi find_subset(long long int, long long int, vi)':
molecules.cpp:55:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         for (int i = 0; i < result.sz; i++) {
      |                           ^
molecules.cpp:40:9: warning: unused variable 'ptr' [-Wunused-variable]
   40 |     int ptr = 0;
      |         ^~~
/usr/bin/ld: /tmp/ccNTPMUB.o: in function `main':
grader.cpp:(.text.startup+0x18d): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status