Submission #914376

#	Time	Username	Problem	Language	Result	Execution time	Memory
914376		VMaksimoski008	Crayfish scrivener (IOI12_scrivener)	C++14	Compilation error	0 ms	0 KiB

scrivener

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

const int maxn = 1e6 + 5;

int up[maxn][LOG], id=0, len[maxn];
char s[maxn];

void Init() {
    s[0] = ' ';
}

void TypeLetter(char ch) {
    s[++id] = ch;
    len[id] = len[id-1] + 1;

    up[id][0] = id - 1;
    for(int i=1; i<LOG; i++) up[id][i] = up[ up[id][i-1] ][i-1];
}

void UndoCommands(int u) {
    int prev = (++id) - u - 1;
    s[id] = s[prev];
    len[id] = len[prev];

    up[id][0] = up[prev][0];
    for(int i=1; i<LOG; i++) up[id][i] = up[ up[id][i-1] ][i-1];
}

char GetLetter(int p) {
    int L = len[id]-p-1, pos = id;
    for(int i=LOG-1; i>=0; i--)
        if(L & (1 << i)) pos = up[pos][i];
	return s[pos];
}

Compilation message (stderr)

scrivener.cpp:6:14: error: 'LOG' was not declared in this scope
    6 | int up[maxn][LOG], id=0, len[maxn];
      |              ^~~
scrivener.cpp: In function 'void TypeLetter(char)':
scrivener.cpp:17:5: error: 'up' was not declared in this scope
   17 |     up[id][0] = id - 1;
      |     ^~
scrivener.cpp:18:20: error: 'LOG' was not declared in this scope
   18 |     for(int i=1; i<LOG; i++) up[id][i] = up[ up[id][i-1] ][i-1];
      |                    ^~~
scrivener.cpp: In function 'void UndoCommands(int)':
scrivener.cpp:26:5: error: 'up' was not declared in this scope; did you mean 'u'?
   26 |     up[id][0] = up[prev][0];
      |     ^~
      |     u
scrivener.cpp:27:20: error: 'LOG' was not declared in this scope
   27 |     for(int i=1; i<LOG; i++) up[id][i] = up[ up[id][i-1] ][i-1];
      |                    ^~~
scrivener.cpp: In function 'char GetLetter(int)':
scrivener.cpp:32:15: error: 'LOG' was not declared in this scope
   32 |     for(int i=LOG-1; i>=0; i--)
      |               ^~~
scrivener.cpp:33:32: error: 'up' was not declared in this scope; did you mean 'p'?
   33 |         if(L & (1 << i)) pos = up[pos][i];
      |                                ^~
      |                                p
scrivener.cpp:32:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   32 |     for(int i=LOG-1; i>=0; i--)
      |     ^~~
scrivener.cpp:34:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   34 |  return s[pos];
      |  ^~~~~~