Submission #1253659

#	Time	Username	Problem	Language	Result	Execution time	Memory
1253659		brinleyhong	Festival (IOI25_festival)	C++20	Compilation error	0 ms	0 KiB

festival

#include <bits/stdc++.h>
using namespace std;
#define nl "\n"
#define sp " "
#define pb push_back
typedef long long ll;
struct elm
{
    int p, t, id;
};
vector <elm> arr;
int n;
ll A;
bool checksub1()
{
    bool flag = true;
    for (int i = 0; i<n; ++i)
    {
        if (arr[i].t != 1)
        {
            flag = false;
            break;
        }
    }
    return flag;
}
bool sortsub1(elm x, elm y)
{
    return (x.p<y.p);
}
void solvesub1()
{
    sort(arr.begin(), arr.end(), sortsub1);
    int tokens_left = A;
    vector <int> ans;
    for (int i = 0; i<n; ++i)
    {
        if (tokens_left>=arr[i].p)
        {
            tokens_left-=arr[i].p;
            ans.pb(arr[i].id);
        }
        else break;
    }
    cout<<ans.size()<<nl;
    for (int i = 0; i<ans.size(); ++i)
        cout<<ans[i]<<sp;
}
void solve()
{
    cin >> n >> A;
    for (int i = 1; i<=n; ++i)
    {
        int P, T;
        cin >> P >> T;
        arr.pb({P, T, i-1});
    }
    if (checksub1())
    {
        solvesub1();
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    freopen("Festival.inp", "r", stdin);
    freopen("Festival.out", "w", stdout);
    solve();
    return 0;
}

Compilation message (stderr)

festival.cpp: In function 'int main()':
festival.cpp:67:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |     freopen("Festival.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
festival.cpp:68:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     freopen("Festival.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cce3wp3D.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccK169gx.o:festival.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cce3wp3D.o: in function `main':
grader.cpp:(.text.startup+0x232): undefined reference to `max_coupons(int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status