Submission #874668

#	Time	Username	Problem	Language	Result	Execution time	Memory
874668		cpptowin	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include<bits/stdc++.h>
#define fo(i,d,c) for(int i=d;i<=c;i++)
#define fod(i,c,d) for(int i=c;i>=d;i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout<<"\n";
#define int long long
#define inf 1000000000
#define pii pair<int,int>
#define vii vector<pii>
#define lb(x) x&-x
#define bit(i,j) ((i>>j)&1)
#define offbit(i,j) (i^(1<<j))
#define onbit(i,j) (i|(1<<j))
#define vi vector<int>
template <typename T1, typename T2> bool minimize(T1 &a, T2 b){if (a > b) {a = b; return true;} return false;}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b){if (a < b) {a = b; return true;} return false;}
using namespace std;
int n;
pii a[maxn];
int p[maxn];
int l,r;
// unord
main()
{
    #define name "TASK"
    if(fopen(name".inp","r"))
    {
       freopen(name".inp","r",stdin);
       freopen(name".out","w",stdout);
    }
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    cin >> n >> l >> r;
    fo(i,1,n) 
    {
        cin >> a[i].fi;
        a[i].se = i;
    }
    sort(a + 1,a + n + 1);
    int sum = 0;
    fo(k,1,n)
    {
        sum += a[k].fi;
        while(sum > r and x <= k) 
        {
            sum -= a[x].fi;
            x++;
        } 
        if(sum >= l)
        {
            vi ans;
            for(int i = x ; i <= k ; i++) ans.pb(a[i].se);
            sort(ans.begin(),ans.end());
            cout << ans.size() << "\n";
            for(int it : ans) cout << it << ' ';
            return 0;
        }
    }
}

Compilation message (stderr)

molecules.cpp:27:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   27 | main()
      | ^~~~
molecules.cpp: In function 'int main()':
molecules.cpp:47:27: error: 'x' was not declared in this scope
   47 |         while(sum > r and x <= k)
      |                           ^
molecules.cpp:55:25: error: 'x' was not declared in this scope
   55 |             for(int i = x ; i <= k ; i++) ans.pb(a[i].se);
      |                         ^
molecules.cpp:32:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |        freopen(name".inp","r",stdin);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
molecules.cpp:33:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |        freopen(name".out","w",stdout);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~