제출 #1255766

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1255766		eradax	축제 (IOI25_festival)	C++20	컴파일 에러	0 ms	0 KiB

festival

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

using ll = long long;
using vl = vector<ll>;
using vvl = vector<vl>;

using vi = vector<int>;
using vvi = vector<vi>;

using a3 = array<ll, 3>;
using v3 = vector<a3>;

#define sz(c) ((int)c.size())

vi max_coupons(int _a, vi p, vi t) {
  int n = sz(p);
  assert(n == sz(t));

  ll a = _a;

  v3 coup;
  for (int i = 0; i < n; i++) {
    coup.push_back({p[i], t[i], i});
  }

  sort(coup.begin(), coup.end(), [](auto lhs, auto rhs) {
    auto [x, y, lind] = lhs;
    auto [z, w, rind] = rhs;

    if (y == 1 && w == 1)
      return x < z;

    return x * y * (w - 1) < z * w * (y - 1);
  });

  vi ret;
  for (auto [x, y, i] : coup)
    ret.push_back(i);

  vvl dp(n + 1, vl(n + 1));
  for (int i = 1; i < n + 1; i++) {
    for (int j = 1; j < n + 1; j++) {
      dp[i][j] = max(dp[i - 1][j], max(min((dp[i - 1][j - 1] - coup[j - 1][0]) * coup[j - 1][1], (ll)1e15), (ll)-1));
    }
  }

  int i = n;
  int j = n;
  while (j >= 0 && dp[i][j] < 0)
    j--;

  if (j < 0)
    return {};

  vi ret;
  for (; i > 0 && j > 0; i--) {
    int nj = j - (max(min((dp[i - 1][j - 1] - coup[j - 1][0]) * coup[j - 1][1], (ll)1e15), (ll)-1) == dp[i][j]);
    ret.push_back(coup[nj][2]);
  }

  return ret;
}

컴파일 시 표준 에러 (stderr) 메시지

festival.cpp: In function 'vi max_coupons(int, vi, vi)':
festival.cpp:57:6: error: redeclaration of 'vi ret'
   57 |   vi ret;
      |      ^~~
festival.cpp:38:6: note: 'vi ret' previously declared here
   38 |   vi ret;
      |      ^~~