Submission #1022716

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022716		vjudge1	Crayfish scrivener (IOI12_scrivener)	C++17	34 / 100	73 ms	70088 KiB

scrivener

#include<bits/stdc++.h>
using namespace std;
char last;
vector<int>rt,sz;
#define N 1<<22
int ch[N][2],CC;
int nn(int a,int b){
    ch[++CC][0]=a;
    ch[CC][1]=b;
    return CC;
}
int nn(int v){
    ch[++CC][0]=v;
    return CC;
}
int upd(int i,int l,int r,int p,int v){
    if(l==r)return nn(v); if(l+r>>1<p)
        return nn(ch[i][0],upd(ch[i][1],l+r+2>>1,r,p,v));
    else return nn(upd(ch[i][0],l,l+r>>1,p,v),ch[i][1]);
}
int query(int i,int l,int r,int p){
    if(l==r)return ch[i][0];
    if(l+r>>1>=p)
        return query(ch[i][0],l,l+r>>1,p);
    return query(ch[i][1],l+r+2>>1,r,p);
}
int buildt(int l,int r){
    if(l==r)return nn('a');
    return nn(buildt(l,l+r>>1),
            buildt(l+r+2>>1,r));
}
void Init() {
    rt.push_back(buildt(1,1e6));
    sz.push_back(1);
}

void TypeLetter(char L) {
    rt.push_back(upd(rt.back(),1,1e6,sz.back(),L));
    sz.push_back(sz.back()+1);
}

void UndoCommands(int U) {
    rt.push_back(rt[rt.size()-U-1]);
    sz.push_back(sz[sz.size()-U-1]);
}

char GetLetter(int P) {
    return query(rt.back(),1,1e6,P+1);
}

Compilation message (stderr)

scrivener.cpp: In function 'int upd(int, int, int, int, int)':
scrivener.cpp:17:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   17 |     if(l==r)return nn(v); if(l+r>>1<p)
      |     ^~
scrivener.cpp:17:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   17 |     if(l==r)return nn(v); if(l+r>>1<p)
      |                           ^~
scrivener.cpp:17:31: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |     if(l==r)return nn(v); if(l+r>>1<p)
      |                              ~^~
scrivener.cpp:18:44: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   18 |         return nn(ch[i][0],upd(ch[i][1],l+r+2>>1,r,p,v));
      |                                         ~~~^~
scrivener.cpp:19:36: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   19 |     else return nn(upd(ch[i][0],l,l+r>>1,p,v),ch[i][1]);
      |                                   ~^~
scrivener.cpp: In function 'int query(int, int, int, int)':
scrivener.cpp:23:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   23 |     if(l+r>>1>=p)
      |        ~^~
scrivener.cpp:24:34: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |         return query(ch[i][0],l,l+r>>1,p);
      |                                 ~^~
scrivener.cpp:25:30: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   25 |     return query(ch[i][1],l+r+2>>1,r,p);
      |                           ~~~^~
scrivener.cpp: In function 'int buildt(int, int)':
scrivener.cpp:29:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     return nn(buildt(l,l+r>>1),
      |                        ~^~
scrivener.cpp:30:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |             buildt(l+r+2>>1,r));
      |                    ~~~^~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 22 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40