more tests

codility/binarygap.cpp

@@ -0,0 +1,58 @@
+#include <cstdio>
+#include <bitset>
+#include <string>
+#include <algorithm>
+
+
+auto bin2str(int num) -> std::string {
+    constexpr std::size_t max_position = sizeof(int) * 8;
+    std::string str{};
+    for (std::size_t i = 0; i < max_position; ++i) {
+        str += (num & (1 << i)) ? '1' : '0';
+        if ((i + 1) % 8 == 0 && i < max_position - 1) str += "'";
+    }
+    std::reverse(std::begin(str), std::end(str));
+    return str;
+}
+
+int solution(int N) {
+    constexpr std::size_t max_position = sizeof(int) * 8;
+    std::size_t start = 0;
+    std::size_t end   = 0;
+
+    std::size_t final_start = 0;
+    std::size_t final_end   = 0;
+
+    for (std::size_t i = 0; i < max_position; ++i) {
+        bool const is_one_start = (N & (1 << i)) >> i;
+        if (is_one_start) {
+            start = i;
+            for (std::size_t j = start + 1; j < max_position; ++j) {
+                bool const is_one_end = (N & (1 << j)) >> j;
+                if (is_one_end) {
+                    end = j;
+                    break;
+                }
+            }
+        } else continue;
+
+        if (end - start > final_end - final_start) {
+            final_start = start;
+            final_end   = end - 1;
+        }
+    }
+
+    std::intptr_t size = final_end - final_start;
+    if (size > 0) return size;
+    else return 0;
+}
+
+auto main() -> int {
+    int input = 32;
+    auto gap  = solution(input);
+    std::printf("Input: %d, [%s]\n", input, bin2str(input).c_str());
+    std::printf("Gap: %d\n", gap);
+    std::printf("%s\n", bin2str(1 << 0).c_str());
+    std::printf("%s\n", bin2str(0x2&(1 << 0)).c_str());
+    return 0;
+}

futureskills/linebreaks.cpp

@@ -0,0 +1,40 @@
+#include <cstdio>
+#include <string>
+#include <cmath>
+
+std::string level1BreakIntoLines(std::string text, int width) {
+    std::string str{};
+    std::size_t col_count = 0;
+    std::size_t space_index_text = 0;
+    std::size_t space_index = 0;
+    for (std::size_t i = 0; i < text.size(); ++i) {
+        if (text[i] == ' ') {
+            space_index_text = i;
+            space_index = str.size();
+        }
+        str += text[i];
+        if (col_count++ >= static_cast<std::size_t>(width)) {
+            i = space_index_text;
+            str.erase(space_index);
+            col_count = 0;
+            str += "\n";
+        }
+    }
+    return str;
+}
+
+std::string level2BreakIntoLines(std::string text, int numLines) {
+    std::size_t const max_column = std::size_t(std::ceil(double(text.size()) / double(numLines)));
+    return level1BreakIntoLines(text, max_column);
+}
+
+auto main() -> int {
+    auto str = level1BreakIntoLines("Hello, World! This is a very goodtest and we are not here to try it out.", 32);
+    std::printf("%s\n", str.c_str());
+
+    std::printf("\n");
+
+    auto str1 = level2BreakIntoLines("The quick brown fox jumps over the lazy dog", 3);
+    std::printf("%s\n", str1.c_str());
+    return 0;
+}

leetcode/longestpalindromicsubstr.c

@@ -18,27 +18,26 @@ char* longestPalindrome(char * input_str) {
 
     size_t c_start = 0;
     size_t c_end   = 0;
-    bool is_first = true;
 
     while (start < len) {
         bool is_palindrome = false;
         end = start;
-        DEBUG_LOG("start: %llu\n", start);
+        DEBUG_LOG("start: %lu\n", start);
         for (size_t i = start; i < len; ++i) {
             const size_t dist = end - start + 1;
             is_palindrome = false;
-            DEBUG_LOG("    dist: %llu:\n", dist);
+            DEBUG_LOG("    dist: %lu:\n", dist);
             for (size_t j = 0; j < dist; ++j) {
                 const size_t start_it = start + j;
                 const size_t end_it   = end - j;
-                DEBUG_LOG("        [%llu]%c = [%llu]%c: %s\n",start_it, input_str[start_it], end_it, input_str[end_it], input_str[start_it] == input_str[end_it] ? "true" : "false");
+                DEBUG_LOG("        [%lu]%c = [%lu]%c: %s\n",start_it, input_str[start_it], end_it, input_str[end_it], input_str[start_it] == input_str[end_it] ? "true" : "false");
                 if (input_str[start_it] == input_str[end_it]) {
                     is_palindrome = true;
                 } else {
                     is_palindrome = false;
                 }
             }
-            if (is_palindrome && end - start > c_end - c_start) break;
+            if (is_palindrome) break;
             ++end;
         }
         DEBUG_LOG("extracted: ");
@@ -46,19 +45,18 @@ char* longestPalindrome(char * input_str) {
             DEBUG_LOG("%c", input_str[start + i]);
         }
         DEBUG_LOG("\n");
-        DEBUG_LOG("[%llu] -> [%llu], c: [%llu] -> [%llu]\n", start, end, c_start, c_end);
+        DEBUG_LOG("[%lu] -> [%lu], c: [%lu] -> [%lu]\n", start, end, c_start, c_end);
         DEBUG_LOG("\n");
-        if (is_palindrome && (end - start > c_end - c_start || is_first)) {
+        if (is_palindrome && end - start > c_end - c_start) {
-            is_first = false;
             c_start = start;
             c_end   = end;
-            DEBUG_LOG("candidate: %llu -> %llu\n", c_start, c_end);
+            DEBUG_LOG("candidate: %lu -> %lu\n", c_start, c_end);
         }
         ++start;
     }
 
     DEBUG_LOG("wow\n");
-    DEBUG_LOG("[%llu] -> [%llu]: size %llu\n", c_start, c_end, c_end - c_start + 1);
+    DEBUG_LOG("[%lu] -> [%lu]: size %lu\n", c_start, c_end, c_end - c_start + 1);
     char* str = (char*)malloc((c_end - c_start + 2) * sizeof(char));
     memcpy(str, input_str + start, (c_end - c_start + 1) * sizeof(char));
     str[c_end - c_start + 1] = '\0';