Merge pull request #7 from AlgoLeadMe/2-YIM2UL2ET

2-YIM2UL2ET

YIM2UL2ET/README.md

@@ -2,5 +2,6 @@
 
 | 차시 |    날짜    | 문제유형 | 링크 | 풀이 |
 |:----:|:---------:|:----:|:-----:|:----:|
-| 1차시 | 2023.10.27 |  그리디  | [BOJ 18310](https://www.acmicpc.net/problem/18310)  | [BOJ 18310 풀이](https://github.com/AlgoLeadMe/AlgoLeadMe-7/pull/3) |
+| 1차시 | 2024.02.12 |  그리디  | [BOJ 18310](https://www.acmicpc.net/problem/18310)  | [BOJ 18310 풀이](https://github.com/AlgoLeadMe/AlgoLeadMe-7/pull/3) |
+| 2차시 | 2024.02.15 |  그리디  | [BOJ 1263](https://www.acmicpc.net/problem/1263)  | [BOJ 1449 풀이](https://github.com/AlgoLeadMe/AlgoLeadMe-7/pull/7) |
 ---

YIM2UL2ET/그리디/2차시- BOJ 1263 .cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+#include <algorithm>
+#include <vector>
+
+bool compare(std::vector <int> &vec1, std::vector <int> &vec2);
+
+int main(void)
+{
+    int n, result, end_time;
+    std::cin >> n;
+
+    std::vector <std::vector <int>> vec(n);
+    for (int i = 0; i < n; i++) {
+        int t, s;
+        std::cin >> t >> s;
+        vec[i].push_back(t);
+        vec[i].push_back(s);
+    }
+
+    std::sort(vec.begin(), vec.end(), compare);
+
+    result = vec[0][1] - vec[0][0], end_time = vec[0][1];
+    for (int i = 1; i < n; i++) {
+        if (end_time + vec[i][0] > vec[i][1]) {
+            result -= end_time + vec[i][0] - vec[i][1];
+            end_time = vec[i][1];
+        }
+        else end_time += vec[i][0];
+    }
+
+    if (result < 0) std::cout << "-1";
+    else std::cout << result;
+
+    return 0;
+}
+
+bool compare(std::vector <int> &vec1, std::vector <int> &vec2)
+{
+    if (vec1[1] == vec2[1]) return vec1[0] < vec2[0];   
+    else return vec1[1] < vec2[1];
+}