Merge pull request #56 from AlgoLeadMe/15-miniron-v

15-miniron-v

miniron-v/DP/1793-타일링.cpp

@@ -0,0 +1,55 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+// 문자열 덧셈
+std::string string_add(std::string a, std::string b) {
+	std::reverse(a.begin(), a.end());
+	std::reverse(b.begin(), b.end());
+
+	// a > b, always.
+	if (a.size() < b.size()) {
+		std::swap(a, b);
+	}
+
+	else if (a.size() == b.size()) {
+		a += '0';
+	}
+
+	int i = 0, carry = 0;
+	std::string sum = "";
+	for (; i < b.size(); ++i) {
+		int num = (a[i] - '0') + (b[i] - '0') + carry;
+		sum.push_back(num % 10 + '0');
+		carry = num / 10;
+	}
+
+	a[i] += carry;
+
+	// a가 남은 경우
+	while (i < a.size()) {
+		sum += a[i++];
+	}
+
+	if (sum[--i] == '0') {
+		sum.pop_back();
+	}
+
+	std::reverse(sum.begin(), sum.end());
+
+	return sum;
+}
+
+int main() {
+	int n;
+	while (std::cin >> n) {
+		std::vector<std::string> dp(n + 1, "1");
+
+		for (int i = 2; i <= n; ++i) {
+			dp[i] = string_add(dp[i - 1], dp[i - 2]);
+			dp[i] = string_add(dp[i], dp[i - 2]);
+		}
+
+		std::cout << dp[n] << " ";
+	}
+}

miniron-v/README.md

@@ -14,6 +14,8 @@
 | 10차시 | 2024.01.28 |  그래프  | [토마토](https://www.acmicpc.net/problem/7569)  | [#38](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/38) |
 | 번외 - 10 | 2024.01.30 |  그래프  | [하이퍼 토마토](https://www.acmicpc.net/problem/17114)  | [#42](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/42) |
 | 11차시 | 2024.01.31 |  브루트포스  | [감소하는 수](https://www.acmicpc.net/problem/1038)  | [#43](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/43) |
-| 12차시 | 2024.01.31 |  DP  | [점프 점프](https://www.acmicpc.net/problem/11060)  | [#48](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/48) |
-| 13차시 | 2024.01.31 |  DP  | [퇴사 2](https://www.acmicpc.net/problem/15486)  | [#50](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/50) |
+| 12차시 | 2024.02.03 |  DP  | [점프 점프](https://www.acmicpc.net/problem/11060)  | [#48](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/48) |
+| 13차시 | 2024.02.06 |  DP  | [퇴사 2](https://www.acmicpc.net/problem/15486)  | [#50](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/50) |
+| 14차시 | 2024.02.11 |  그래프, DP  | [ACM Craft](https://www.acmicpc.net/problem/1005)  | [#53](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/53) |
+| 15차시 | 2024.02.15 |  DP, 큰 수 연산  | [타일링](https://www.acmicpc.net/problem/1793)  | [#56](https://github.com/AlgoLeadMe/AlgoLeadMe-5/pull/56) |
 ---

miniron-v/그래프/1005-ACM Craft.cpp

@@ -0,0 +1,90 @@
+#include <iostream>
+#include <vector>
+#include <queue>
+
+int n, k, w;
+
+// dp (시간 계산)
+std::vector<int> cost;
+std::vector<int> min_cost;
+
+// 위상정렬 (순서 지정)
+std::vector<std::vector<int>> graph;
+std::vector<int> inDegree;
+std::queue<int> queue;
+
+std::vector<int> sorted;
+
+void input() {
+	std::cin >> n >> k;
+
+	cost.assign(n + 1, 0);
+	min_cost.assign(n + 1, 0);
+
+	graph.assign(n + 1, std::vector<int>(0));
+	inDegree.assign(n + 1, 0);
+
+	sorted.clear();
+
+	for (int i = 1; i <= n; ++i) {
+		std::cin >> cost[i];
+	}
+
+	int a1, a2;
+	while (k--) {
+		std::cin >> a1 >> a2;
+		graph[a1].push_back(a2);
+		++inDegree[a2];
+	}
+
+	std::cin >> w;
+}
+
+void topologySort() {
+	for (int i = 1; i < inDegree.size(); i++) {
+		if (inDegree[i] == 0) {
+			queue.push(i);
+		}
+	}
+
+	int a;
+	while (queue.empty() == false) {
+		a = queue.front();
+		queue.pop();
+
+		sorted.push_back(a);
+
+		for (int i : graph[a]) {
+			if (--inDegree[i] == 0) {
+				queue.push(i);
+			}
+		}
+	}
+}
+
+int minCost() {
+	for (int a : sorted) {
+		min_cost[a] += cost[a];
+
+		for (int i : graph[a]) {
+			if (min_cost[a] > min_cost[i]) {
+				min_cost[i] = min_cost[a];
+			}
+		}
+	}
+
+	return min_cost[w];
+}
+
+int main() {
+	int t;
+	std::cin >> t;
+
+	while (t--) {
+		input();
+
+		topologySort();
+
+		std::cout << minCost() << "\n";
+	}
+}