제출 #1255076

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1255076		otarius	축제 (IOI25_festival)	C++20	컴파일 에러	0 ms	0 KiB

festival

// #include "festival.h"
#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;

// #pragma GCC optimize("Ofast")
// #pragma GCC optimize ("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#define ff first
#define sc second
#define pb push_back
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define ull unsigned long long
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rngl(chrono::steady_clock::now().time_since_epoch().count());

// #define int long long
// #define int unsigned long long

// #define ordered_set(T) tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>
// #define ordered_multiset(T) tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>

// const ll mod = 1e9 + 7;
// const ll mod = 998244353;

const ll inf = 1e9;
const ll biginf = 1e18;
// const int maxN;

bool comp(array<int, 3> a, array<int, 3> b) {
    return a[0] * a[1] * b[1] + b[0] * b[1] < a[0] * a[1] * b[1] + a[0] * a[1];
}
vector<int> max_coupons(int a, vector<int> p, vector<int> t) {
    vector<array<int, 3>> v;
    for (int i = 0; i < p.size(); i++)
        v.pb({p[i], t[i], i});
    sort(all(v), comp);
    vector<int> ans;
    for (auto i : v) ans.pb(v[i][2]);
    return ans;
}
int main() {
  int N, A;
  assert(2 == scanf("%d %d", &N, &A));
  std::vector<int> P(N), T(N);
  for (int i = 0; i < N; i++)
    assert(2 == scanf("%d %d", &P[i], &T[i]));
  fclose(stdin);

  std::vector<int> R = max_coupons(A, P, T);

  int S = R.size();
  printf("%d\n", S);
  for (int i = 0; i < S; i++)
    printf("%s%d", (i == 0 ? "" : " "), R[i]);
  printf("\n");
  fclose(stdout);

  return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

festival.cpp: In function 'std::vector<int> max_coupons(int, std::vector<int>, std::vector<int>)':
festival.cpp:46:30: error: no match for 'operator[]' (operand types are 'std::vector<std::array<int, 3> >' and 'std::array<int, 3>')
   46 |     for (auto i : v) ans.pb(v[i][2]);
      |                              ^
In file included from /usr/include/c++/11/vector:67,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from festival.cpp:2:
/usr/include/c++/11/bits/stl_vector.h:1043:7: note: candidate: 'std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](std::vector<_Tp, _Alloc>::size_type) [with _Tp = std::array<int, 3>; _Alloc = std::allocator<std::array<int, 3> >; std::vector<_Tp, _Alloc>::reference = std::array<int, 3>&; std::vector<_Tp, _Alloc>::size_type = long unsigned int]'
 1043 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:1043:28: note:   no known conversion for argument 1 from 'std::array<int, 3>' to 'std::vector<std::array<int, 3> >::size_type' {aka 'long unsigned int'}
 1043 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
/usr/include/c++/11/bits/stl_vector.h:1061:7: note: candidate: 'std::vector<_Tp, _Alloc>::const_reference std::vector<_Tp, _Alloc>::operator[](std::vector<_Tp, _Alloc>::size_type) const [with _Tp = std::array<int, 3>; _Alloc = std::allocator<std::array<int, 3> >; std::vector<_Tp, _Alloc>::const_reference = const std::array<int, 3>&; std::vector<_Tp, _Alloc>::size_type = long unsigned int]'
 1061 |       operator[](size_type __n) const _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:1061:28: note:   no known conversion for argument 1 from 'std::array<int, 3>' to 'std::vector<std::array<int, 3> >::size_type' {aka 'long unsigned int'}
 1061 |       operator[](size_type __n) const _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~