[w3] Added solutions

12 files changed, 249 insertions, 0 deletions

diff --git a/week03/exercise01.cpp b/week03/exercise01.cpp
new file mode 100644
index 0000000..1bfe5f5
--- /dev/null
+++ b/week03/exercise01.cpp
@@ -0,0 +1,11 @@
+#include <iostream>
+
+int main() {
+	unsigned int x, n;
+	std::cin >> x >> n;
+	unsigned int xToPowerOfN = 1;
+	for (int i = 0; i < n; i++) {
+		xToPowerOfN *= x;
+	}
+	std::cout << xToPowerOfN << std::endl;
+}
diff --git a/week03/exercise02-bonus.cpp b/week03/exercise02-bonus.cpp
new file mode 100644
index 0000000..6b553ad
--- /dev/null
+++ b/week03/exercise02-bonus.cpp
@@ -0,0 +1,15 @@
+#include <iostream>
+
+int main() {
+	int x;
+	std::cin >> x;
+	double step = 10.0 / x;
+	double length = step;
+	while (length <= 10) {
+		for (int col = 0; col < length; col++) {
+			std::cout << '#';
+		}
+		std::cout << std::endl;
+		length += step;
+	}
+}
diff --git a/week03/exercise02.cpp b/week03/exercise02.cpp
new file mode 100644
index 0000000..dd301e8
--- /dev/null
+++ b/week03/exercise02.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+
+int main() {
+	int x;
+	std::cin >> x;
+	for (int row = 0; row < x; row++) {
+		for (int col = 0; col <= row; col++) {
+			std::cout << '#';
+		}
+		std::cout << std::endl;
+	}
+}
diff --git a/week03/exercise03.cpp b/week03/exercise03.cpp
new file mode 100644
index 0000000..bc7879b
--- /dev/null
+++ b/week03/exercise03.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+
+int main() {
+	char input;
+	std::cin >> input;
+	while (input != '^') {
+		if (('A' <= input && input <= 'Z') ||
+		    ('a' <= input && input <= 'z')) {
+			std::cout << "letter" << std::endl;
+		}
+		else if ('0' <= input && input <= '9') {
+			std::cout << "digit" << std::endl;
+		}
+		else {
+			std::cout << "other" << std::endl;
+		}
+		std::cin >> input;
+	}
+}
diff --git a/week03/exercise04.cpp b/week03/exercise04.cpp
new file mode 100644
index 0000000..fb37716
--- /dev/null
+++ b/week03/exercise04.cpp
@@ -0,0 +1,13 @@
+#include <iostream>
+
+int main() {
+	int num = 65536;
+	int input;
+	for (int i = 0; i < 10; i++) {
+		std::cin >> input;
+		if (input == 0) break;
+
+		num /= input;
+	}
+	std::cout << num << std::endl;
+}
diff --git a/week03/exercise05.cpp b/week03/exercise05.cpp
new file mode 100644
index 0000000..0facfdb
--- /dev/null
+++ b/week03/exercise05.cpp
@@ -0,0 +1,24 @@
+#include <iostream>
+
+int main() {
+	int countLower = 0, countUpper = 0, countDigit = 0;
+	char input;
+	std::cin >> input;
+	while (input != '$') {
+		if (input == '@') {
+			return 0;
+		}
+		// Грешка ли е, че тук има "if" вместо "else if"?
+		if ('a' <= input && input <= 'z') {
+			countLower++;
+		}
+		else if ('A' <= input && input <= 'Z') {
+			countUpper++;
+		}
+		else if ('0' <= input && input <= '9') {
+			countDigit++;
+		}
+		std::cin >> input;
+	}
+	std::cout << "Lowercase: " << countLower << " Uppercase: " << countUpper << " Digit: " << countDigit << std::endl;
+}
diff --git a/week03/exercise06.cpp b/week03/exercise06.cpp
new file mode 100644
index 0000000..d257e29
--- /dev/null
+++ b/week03/exercise06.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+
+int main() {
+	int num = 15;
+	char command = '\0';
+	while (true) {
+		std::cin >> command;
+		switch (command) {
+			case 's': std::cin >> num; break;
+			case 'l': num <<= 1; break;
+			case 'r': num >>= 1; break;
+			case 'q': num *= num; break;
+			case 'c': num *= num * num; break;
+			case 'm': num -= 351; break;
+			case 'p': num += 94; break;
+			case '&': return 0;
+			default:
+				std::cout << "Invalid command!" << std::endl;
+				continue;
+		}
+		std::cout << num << std::endl;
+	}
+}
diff --git a/week03/exercise07.cpp b/week03/exercise07.cpp
new file mode 100644
index 0000000..00fd65b
--- /dev/null
+++ b/week03/exercise07.cpp
@@ -0,0 +1,15 @@
+#include <iostream>
+
+int main() {
+	double num = 3.14159;
+	do {
+		if (num > 0) {
+			std::cout << "Positive" << std::endl;
+		}
+		else {
+			std::cout << "Negative" << std::endl;
+		}
+
+		std::cin >> num;
+	} while (num != 0);
+}
diff --git a/week03/exercise08.cpp b/week03/exercise08.cpp
new file mode 100644
index 0000000..736ed31
--- /dev/null
+++ b/week03/exercise08.cpp
@@ -0,0 +1,43 @@
+#include <iostream>
+
+int main() {
+	unsigned int time = 0;
+	char input;
+	unsigned int mode = 0;
+	bool twelveHour = false;
+	while (true) {
+		std::cin >> input;
+		switch (input) {
+			case 'c':
+				if (mode == 0) {
+					unsigned newHour;
+					std::cin >> newHour;
+					time = 60 * newHour + time % 60;
+				}
+				else if (mode == 1) {
+					unsigned newMinutes;
+					std::cin >> newMinutes;
+					time = (time - time % 60) + newMinutes;
+				}
+				mode = (mode + 1) % 3;
+				twelveHour = !twelveHour;
+			case 'f':
+				twelveHour = !twelveHour;
+				if (mode == 0) {
+					time -= 1;
+				}
+			case 't':
+				if (mode == 0) {
+					time = (time + 1) % 1440; // 60 minutes * 24 hours
+				}
+				if (twelveHour) {
+					bool pm = (time / 60) > 12;
+					std::cout << (time / 60) - 12 * pm << ":" << (time % 60) << " " << (pm ? "PM" : "AM") << std::endl;
+				}
+				else {
+					std::cout << (time / 60) << ":" << (time % 60) << std::endl;
+				}
+				break;
+		}
+	}
+}
diff --git a/week03/exercise09.cpp b/week03/exercise09.cpp
new file mode 100644
index 0000000..a4a5008
--- /dev/null
+++ b/week03/exercise09.cpp
@@ -0,0 +1,13 @@
+#include <iostream>
+#include <stdlib.h>
+#include <ctime>
+
+int main() {
+	srand(time(NULL));
+	for (int row = 0; row < 20; row++) {
+		for (int col = 0; col < 20; col++) {
+			std::cout << ((rand() % 2) ? '/' : '\\');
+		}
+		std::cout << std::endl;
+	}
+}
diff --git a/week03/exercise10.cpp b/week03/exercise10.cpp
new file mode 100644
index 0000000..0b7ef87
--- /dev/null
+++ b/week03/exercise10.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+
+int main() {
+	int current = 0, memory = 0, temp = 0;
+	std::cin >> current;
+	char buff;
+	bool printMem = false;
+	while (true) {
+		std::cin >> buff;
+		switch (buff) {
+			case 'a': memory += current; printMem = true; break;
+			case 's': memory -= current; printMem = true; break;
+			case 'm': memory = 0; printMem = true; break;
+
+			case 'c': current = 0; std::cout << current << std::endl; continue;
+		}
+		if (printMem) {
+			std::cout << memory << std::endl;
+			printMem = false;
+			continue;
+		}
+
+		std::cin >> temp;
+		switch (buff) {
+			case '+': current += temp; break;
+			case '-': current -= temp; break;
+			case '*': current *= temp; break;
+			case '/': current /= temp; break;
+		}
+		std::cout << current << std::endl;
+	}
+}
diff --git a/week03/exercise11.cpp b/week03/exercise11.cpp
new file mode 100644
index 0000000..c4bf464
--- /dev/null
+++ b/week03/exercise11.cpp
@@ -0,0 +1,29 @@
+#include <iostream>
+#include <cassert>
+
+int parseSensor(int s) { return ((((s=(s>>1)&(~0xF617A100))<0x54)?s|0xF01:s&0xCBFF)>>2)-21; }
+
+int main() {
+	int rawValue;
+	std::cin >> rawValue;
+
+	int temp = parseSensor(rawValue);
+	assert(-20 <= temp);
+	assert(temp <= 40);
+
+	if (30 <= temp && temp <= 40) {
+		std::cout << "Hot" << std::endl;
+	}
+	else if (20 <= temp && temp <= 29) {
+		std::cout << "Warm" << std::endl;
+	}
+	else if (11 <= temp && temp <= 19) {
+		std::cout << "Temperate" << std::endl;
+	}
+	else if (0 <= temp && temp <= 10) {
+		std::cout << "Cold" << std::endl;
+	}
+	else if (-20 <= temp && temp <= -1) {
+		std::cout << "Freezing" << std::endl;
+	}
+}