제출 #61810

#제출 시각아이디문제언어결과실행 시간메모리
61810theknife2001Crayfish scrivener (IOI12_scrivener)C++17
0 / 100
225 ms2384 KiB
#include <bits/stdc++.h> #define ii pair < char , char > #define fi first #define se second using namespace std; const int N=1e6+5; ii a[N]; char s[N]; bool q=0; int i=0; void Init() {} void TypeLetter(char L) { a[i]={'T',L}; i++; } void UndoCommands(int U) { a[i]={'U','0'+U}; i++; } int j=0; char GetLetter(int P) { int cnt=0; if(!q) { j=0; while(i>0) { i--; if(a[i].fi=='T') { s[j]=a[i].se; j++; } else if(a[i].fi=='U') { i-=(a[i].se-'0'); } else break; cnt++; if(cnt>1e7) assert(0); } reverse(s,s+j); } q=1; return s[P]; }
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