Added my work from todays up exam

4 files changed, 137 insertions, 0 deletions

diff --git a/Year 1/Programming introduction/Exams/Exam2/README.md b/Year 1/Programming introduction/Exams/Exam2/README.md
new file mode 100644
index 0000000..d236f2b
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+++ b/Year 1/Programming introduction/Exams/Exam2/README.md
@@ -0,0 +1,2 @@
+**Exam Date**: 11.01.2022
+**Grade**: TBD
diff --git a/Year 1/Programming introduction/Exams/Exam2/prob1.cpp b/Year 1/Programming introduction/Exams/Exam2/prob1.cpp
new file mode 100644
index 0000000..76d3971
--- /dev/null
+++ b/Year 1/Programming introduction/Exams/Exam2/prob1.cpp
@@ -0,0 +1,34 @@
+#include <iostream>
+
+bool isAlphanumeric(char ch) {
+	return (ch >= '0' && ch <= '9') || (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z');
+}
+
+char* minWord(char *str) {
+	int startIndex = 0;
+	while (str[startIndex] != '\0' && !isAlphanumeric(str[startIndex]))
+		startIndex++;
+
+	char *ptr = &str[startIndex];
+
+	for (int i = startIndex, wordStart = 0; str[i] != '\0'; i++) {
+		for (int j = i; isAlphanumeric(str[i]) && isAlphanumeric(ptr[wordStart]); i++, wordStart++) {
+			if (str[i] < ptr[wordStart])
+				ptr = &str[j];
+			else if (str[i] != ptr[wordStart])
+				break;
+		}
+		wordStart = 0;
+	}
+
+	return ptr;
+}
+
+int main() {
+	char input[] = "me? why always me?";
+	char *str = minWord(input);
+
+	for (int i = 0; str[i] != '\0'; i++)
+		std::cout << str[i];
+	std::cout << std::endl;
+}
diff --git a/Year 1/Programming introduction/Exams/Exam2/prob2.cpp b/Year 1/Programming introduction/Exams/Exam2/prob2.cpp
new file mode 100644
index 0000000..72cb50e
--- /dev/null
+++ b/Year 1/Programming introduction/Exams/Exam2/prob2.cpp
@@ -0,0 +1,60 @@
+#include <iostream>
+
+const int MAX_SIZE = 30;
+
+bool hasRepeatedDigits(int n) {
+	for (int lastDigit = 0; n != 0; n /= 10) {
+		lastDigit = n % 10;
+		for (int tmp = n / 10; tmp != 0; tmp /= 10) {
+			if (tmp % 10 == lastDigit)
+				return true;
+		}
+	}
+	return false;
+}
+
+int getRepeatedLen(int matrix[MAX_SIZE][MAX_SIZE], int n) {
+	int arrSize = 0;
+	for (int col = 0, row = n - 1; col < n && row < n; col = (row > 0) ? 0 : col + 1, row = (row > 0) ? row - 1 : 0) {
+		for (int k = col, l = row; k < n && l < n; k++, l++) {
+			if (hasRepeatedDigits(matrix[l][k]))
+				arrSize++;
+		}
+	}
+	return arrSize;
+}
+
+int* collect(int matrix[MAX_SIZE][MAX_SIZE], int n) {
+	int arrSize = getRepeatedLen(matrix, n);
+	int *arr = new int[arrSize];
+
+	for (int col = 0, row = n - 1, arrI = 0; col < n && row < n; col = (row > 0) ? 0 : col + 1, row = (row > 0) ? row - 1 : 0) {
+		for (int k = col, l = row; k < n && l < n; k++, l++) {
+			if (hasRepeatedDigits(matrix[l][k]))
+				arr[arrI++] = matrix[l][k];
+		}
+	}
+
+	return arr;
+}
+
+int main() {
+	int n;
+	std::cin >> n;
+
+	int matrix[MAX_SIZE][MAX_SIZE];
+	for (int i = 0; i < n; i++) {
+		for (int j = 0; j < n; j++)
+			std::cin >> matrix[i][j];
+	}
+
+	int *repeated = collect(matrix, n);
+	int repeatedLen = getRepeatedLen(matrix, n); // По условие няма как иначе да върнем размера
+
+	for (int i = 0; i < repeatedLen; i++) {
+		std::cout << repeated[i] << " ";
+	}
+	std::cout << std::endl;
+
+	delete[] repeated;
+}
diff --git a/Year 1/Programming introduction/Exams/Exam2/prob3.cpp b/Year 1/Programming introduction/Exams/Exam2/prob3.cpp
new file mode 100644
index 0000000..8f1a85a
--- /dev/null
+++ b/Year 1/Programming introduction/Exams/Exam2/prob3.cpp
@@ -0,0 +1,41 @@
+#include <iostream>
+
+int getLetterValue(char letter, int n, char *letters, int *values) {
+	for (int i = 0; i < n; i++) {
+		if (letters[i] == letter)
+			return values[i];
+	}
+	return 0;
+}
+
+int calculate(char *str, int n, char *letters, int *values) {
+	if (str[1] == '\0')
+		return getLetterValue(str[0], n, letters, values);
+
+	int sum = 0, prod = getLetterValue(str[0], n, letters, values);
+
+	for (int i = 1; str[i] != '\0'; i++) {
+		if (str[i] == '+') {
+			sum += prod;
+			prod = 1;
+		}
+		else if (str[i] != '.')
+			prod *= getLetterValue(str[i], n, letters, values);
+	}
+
+	sum += prod;
+
+	return sum;
+}
+
+int main() {
+	char str[] = "a.b+b.c+d+a.c";
+	char letters[] = { 'a', 'b', 'c', 'd' };
+	int values[]   = {  2 ,  5 ,  3 ,  42 };
+	std::cout << calculate(str, 4, letters, values) << std::endl;;
+
+	char str1[] = "h.e.l.l.o+w.o.r.l.d";
+	char letters1[] = { 'd', 'e', 'h', 'l', 'o', 'r' };
+	int values1[]   = {  3 ,  2 ,  3 ,  1 ,  5 ,  10 };
+	std::cout << calculate(str1, 6, letters1, values1) << std::endl;
+}