제출 #548722

#제출 시각아이디문제언어결과실행 시간메모리
548722ikaurovCrayfish scrivener (IOI12_scrivener)C++17
60 / 100
1029 ms87112 KiB
#pragma GCC optimize("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define all(arr) (arr).begin(), (arr).end()
#define ll long long
#define ld long double
#define pb push_back
#define sz(x) int((x).size())
#define fi first
#define se second
#define endl '\n'
 
const int N = 1e6 + 20, LOG = 20;
 
int par[N][LOG], lg[N];
int dp[N];
string s = ".";
 
void Init(){
  lg[1] = 0;
  for (int i = 2; i < N; i++) lg[i] = lg[i >> 1] + 1;
}
 
void TypeLetter(char c){
  int idx = sz(s);
  dp[idx] = dp[idx - 1] + 1;
  s.pb(c);
  par[idx][0] = idx - 1;
  for (int i = 1; i < LOG; i++){
    par[idx][i] = par[par[idx][i - 1]][i - 1];
    if (!par[idx][i]) break;
  }
}
 
void UndoCommands(int x){
  int idx = sz(s);
  dp[idx] = dp[max(idx - 1 - x, 0)];
  s.pb('#');
  par[idx][0] = max(idx - 1 - x, 0);
  for (int i = 1; i < LOG; i++){
    par[idx][i] = par[par[idx][i - 1]][i - 1];
    if (!par[idx][i]) break;
  }
}
 
char GetLetter(int pos){
  int idx = sz(s) - 1;
  for (int i = lg[sz(s)]; i >= 0; i--){
    if (dp[par[idx][i]] > pos) idx = par[idx][i];
  }
  return s[idx];
}
 
// signed main(){
//   ios_base::sync_with_stdio(0);
//   cin.tie(0);
//   // cout.precision(20);
//   Init();
//   TypeLetter('a');
//   TypeLetter('b');
//   GetLetter(1);
//   TypeLetter('d');
//   UndoCommands(2);
//   UndoCommands(1);
//   GetLetter(2);
//   TypeLetter('e');
//   UndoCommands(1);
//   UndoCommands(5);
//   TypeLetter('c');
//   GetLetter(2);
//   UndoCommands(2);
//   GetLetter(2);
// }

컴파일 시 표준 에러 (stderr) 메시지

scrivener.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("unroll-loops")
      |
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