Submission #591571

#	Time	Username	Problem	Language	Result	Execution time	Memory
591571		stevancv	Crayfish scrivener (IOI12_scrivener)	C++14	100 / 100	439 ms	185408 KiB

scrivener

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e6;
int st[20 * N], lc[20 * N], rc[20 * N], root[N], tsz;
void Add(int& node, int pnode, int l, int r, int x, int y) {
    node = ++tsz;
    if (l == r) {st[node] = y; return; }
    lc[node] = lc[pnode]; rc[node] = rc[pnode];
    int mid = l + r >> 1;
    if (x <= mid) Add(lc[node], lc[pnode], l, mid, x, y);
    else Add(rc[node], rc[pnode], mid + 1, r, x, y);
}
int Get(int node, int l, int r, int p) {
    if (l == r) return st[node];
    int mid = l + r >> 1;
    if (p <= mid) return Get(lc[node], l, mid, p);
    else return Get(rc[node], mid + 1, r, p);
}
int sz[N], ind;
void TypeLetter(char c) {
    ind += 1;
    sz[ind] = sz[ind - 1] + 1;
    int br = c - 'a' + 1;
    Add(root[ind], root[ind - 1], 1, N, sz[ind], br);
}
void UndoCommands(int u) {
    ind += 1;
    u += 1;
    sz[ind] = sz[ind - u];
    root[ind] = root[ind - u];
}
char GetLetter(int p) {
    p += 1;
    int x = Get(root[ind], 1, N, p);
    return (char)(x + 'a' - 1);
}
void Init() {}

Compilation message (stderr)

scrivener.cpp: In function 'void Add(int&, int, int, int, int, int)':
scrivener.cpp:15:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   15 |     int mid = l + r >> 1;
      |               ~~^~~
scrivener.cpp: In function 'int Get(int, int, int, int)':
scrivener.cpp:21:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   21 |     int mid = l + r >> 1;
      |               ~~^~~

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