[BOJ] 11509 풍선 맞추기 (G5)

Author: uiop5809

박예진/11주차/260310.cpp

@@ -0,0 +1,27 @@
+//https://www.acmicpc.net/problem/11509
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+int N, answer;
+int arrow[1000001]; // 높이별 화살의 개수
+
+int main() {
+	ios::sync_with_stdio(false);
+	cin.tie(NULL); cout.tie(NULL);
+
+    cin >> N;
+    for (int i = 0; i < N; i++) {
+        int h;
+        cin >> h;
+
+        if (arrow[h] > 0) arrow[h]--;
+        else answer++;
+
+        arrow[h - 1]++;
+    }
+    cout << answer;
+
+	return 0;
+}