Submission #772127

#	Time	Username	Problem	Language	Result	Execution time	Memory
772127		Tkm_algo	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include "bits/stdc++.h"
// #include "molecules.h"

using namespace std;
using ll = long long;
const int N = 1e4 + 10;

vector<int> find_subset(int l, int u, vector<int> w) {
	vector<int> v(N);
	v[0] = 1;
	for (int y = 0; y < w.size(); y++) {
		int x = w[y];
		for (int i = N - 1; i >= 0; i--) {
			if (v[i] && i + x < N) {
				v[i + x] = y;
			}
		}
	}
	int res = 0;
	for (int i = l; i <= u; i++) {
		if (v[i]) {
			res = i;
			break;
		}
	}
	vector<int> ans;
	while (res != 0) {
		ans.push_back(v[res]);
		res -= w[v[res]];
	}
	return ans;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	int l, u;
	cin >> l >> u;
	int n;
	cin >> n;
	vector<int> w;
	for (int i = 0; i < n; i++) {
		int x;
		cin >> x;
		w.push_back(x);
	}
	vector<int> ans = find_subset(l, u, w);
	for (auto x : ans) {
		cout << x << ' ';
	}
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for (int y = 0; y < w.size(); y++) {
      |                  ~~^~~~~~~~~~
/usr/bin/ld: /tmp/ccGmwrkf.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccNzbcLd.o:molecules.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status