Submission #1068846

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068846		kiethm07	Detecting Molecules (IOI16_molecules)	C++11	0 / 100	0 ms	348 KiB

molecules

#include <bits/stdc++.h>

#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second

#define vi vector<int>
#define vii vector<pii>
#define pb(i) push_back(i)
#define all(x) x.begin(),x.end()

#define TEXT "a"

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);

vector<int> find_subset(int l,int r,vector<int> w){
    int n = w.size();
    vector<pii> a(n);
    for (int i = 0; i < n; i++){
        a[i] = pii(w[i],i);
    }
    sort(all(a));
    ll sum = 0;
    for (int i = 0; i < n; i++){
        sum += a[i].fi - a[0].fi;
    }
    vector<int> res;
    for (ll x = 1; x <= n; x++){
        ll c = l - x * a[0].fi;
        ll d = r - x * a[0].fi;
        if (d < 0) break;
        if (sum < c) continue;
        ll cur = 0;
        for (int j = n - 1; j >= 0; j--){
            int p = a[j].fi - a[0].fi;
            if (cur + j > d) continue;
            cur += j;
            res.push_back(a[j].se);
            if (res.size() == x) break;
        }
        if (res.size() != x) return {};
        break;
    }
    return res;
}
//
//int main(){
//    int l = 15,r = 17;
//    vector<int> w = {6,8,8,7};
//    vi v = find_subset(l,r,w);
//    for (int i : v) cout << i << " "; cout << "\n";
//    l = 14, r = 15;
//    w = {5,5,6,6};
//    v = find_subset(l,r,w);
//    for (int i : v) cout << i << " "; cout << "\n";
//    l = 10, r = 20;
//    w = {15,17,16,18};
//    v = find_subset(l,r,w);
//    for (int i : v) cout << i << " "; cout << "\n";
//    return 0;
//}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:48:28: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   48 |             if (res.size() == x) break;
      |                 ~~~~~~~~~~~^~~~
molecules.cpp:44:17: warning: unused variable 'p' [-Wunused-variable]
   44 |             int p = a[j].fi - a[0].fi;
      |                 ^
molecules.cpp:50:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   50 |         if (res.size() != x) return {};
      |             ~~~~~~~~~~~^~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31