제출 #867745

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
867745	2023-10-29 12:07:53	goodspeed0208	Group Photo (JOI21_ho_t3)	C++14	12 / 100	1866 ms	123556 KiB

Main

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#include<iostream>
#include<vector>
#include<algorithm>
#define INF 1000000000
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int>v(n);
  for (auto &i : v) cin >> i;
  vector<vector<int> >dp((1 << n), vector<int>(n, INF));
  vector<int>back(n, 0);
  for (int i = n-2 ; i >= 0 ; i--) {
    back[i] = back[i+1] | (1 << (i+1));
    //cout << back[i] << " ";
  }
  //cout << "\n";
  int cost = 1;
  for (int i = 0 ; i < n ; i++) dp[1 << i][i] = i;
  for (int i = 1 ; i < (1 << n) ; i++) {
    int t = __builtin_popcount(i);
    for (int j = 0 ; j < n ; j++) {
      for (int k = 0 ; k < n ; k++) {
        if ( ((i >> k) & 1)==0 && (v[j] < v[k] + 2) ) {
          int cost = k - t + __builtin_popcount(i & back[k]);
          //cout << k << " " << t << " " << __builtin_popcount(i & back[k]) << "\n";
          dp[i | (1 << k) ][k] = min(dp[i | (1 << k)][k], dp[i][j] + cost);
        }
      } 
 
 
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컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:19:6: warning: unused variable 'cost' [-Wunused-variable]
   19 |  int cost = 1;
      |      ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 32
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• Subtask 5: 0 / 36