HIIT Generation

input/code.cpp: In function 'void r(char, int)':
input/code.cpp:21:37: warning: 'tablesize' may be used uninitialized in this function [-Wmaybe-uninitialized]
         while (i + step < tablesize && table[i + step] <= y)  {
                ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

#include <iostream>
#include <stdio.h>
 
using namespace std;
 
int h[1000000];
int ii[1000000];
int t[1000000];
int hs, is, ts;
 
void r(char a, int y) {
 
    int *table;
    int tablesize;
    if (a == 'H') {table = h; tablesize = hs;}
    if (a == 'I') {table = ii; tablesize = is;}
    if (a == 'T') {table = t; tablesize = ts;}
    
    int i = -1;
    for (int step = 100000; step > 0; step /= 2) {
        while (i + step < tablesize && table[i + step] <= y)  {
            i += step;
        }
    }
 
    if (i + 1 != tablesize) {
        r('H', table[i+1]);
        r('I', table[i+1]);
        r('I', table[i+1]);
        r('T', table[i+1]);
        return;
    }
 
    putchar_unlocked(a);
}
 
int main() {
    int n;
    cin >> n;
    
    hs = is = ts = 0;
    for (int i = 0; i < n; i++) {
        char tmp;
        cin >> tmp;
        if (tmp == 'H') { h[hs++] = i;}
        if (tmp == 'I') { ii[is++] = i;}
        if (tmp == 'T') { t[ts++] = i;}
    }
    
    r('H', -1);
    r('I', -1);
    r('I', -1);
    r('T', -1);
    putchar_unlocked('\n');
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED