diff --git a/BOJ_10815 b/BOJ_10815
new file mode 100644
index 0000000..7425884
--- /dev/null
+++ b/BOJ_10815
@@ -0,0 +1,35 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+int main() {
+    int n, m;
+    cin >> n;
+    vector<int> cards(n);
+    
+    for (int i = 0; i < n; i++) {
+        cin >> cards[i];
+    }
+    
+    // 숫자 카드 배열 정렬
+    sort(cards.begin(), cards.end());
+
+    cin >> m;
+    vector<int> query(m);
+    for (int i = 0; i < m; i++) {
+        cin >> query[i];
+    }
+
+    for (int i = 0; i < m; i++) {
+        // 이분 탐색을 통해 query[i]가 cards에 있는지 확인
+        if (binary_search(cards.begin(), cards.end(), query[i])) {
+            cout << "1 ";
+        } else {
+            cout << "0 ";
+        }
+    }
+    
+    cout << endl;
+    return 0;
+}
diff --git a/BOJ_16401 b/BOJ_16401
new file mode 100644
index 0000000..bbfaddf
--- /dev/null
+++ b/BOJ_16401
@@ -0,0 +1,40 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+bool canDivideSnacks(const vector<int>& snacks, int numChildren, int length) {
+    int count = 0;
+    for (int snack : snacks) {
+        count += snack / length;
+        if (count >= numChildren) return true; // 필요한 아이 수만큼 나눠줄 수 있으면 true
+    }
+    return count >= numChildren;
+}
+
+int main() {
+    int numChildren, numSnacks;
+    cin >> numChildren >> numSnacks;
+    
+    vector<int> snacks(numSnacks);
+    for (int i = 0; i < numSnacks; i++) {
+        cin >> snacks[i];
+    }
+    
+    // 과자의 길이를 내림차순으로 정렬하여 큰 길이부터 탐색하도록 합니다.
+    sort(snacks.begin(), snacks.end(), greater<int>());
+
+    int left = 1, right = snacks[0], answer = 0;
+    while (left <= right) {
+        int mid = (left + right) / 2;
+        if (canDivideSnacks(snacks, numChildren, mid)) {
+            answer = mid; // 가능한 길이이므로 저장
+            left = mid + 1; // 더 큰 길이를 탐색
+        } else {
+            right = mid - 1; // 길이가 부족하면 더 작은 길이를 탐색
+        }
+    }
+
+    cout << answer << endl;
+    return 0;
+}
diff --git a/BOJ_17266 b/BOJ_17266
new file mode 100644
index 0000000..13cb413
--- /dev/null
+++ b/BOJ_17266
@@ -0,0 +1,39 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+bool canLightUpTunnel(int height, const vector<int>& positions, int tunnelLength) {
+    int currentCoverage = 0;
+    for (int pos : positions) {
+        if (currentCoverage < pos - height) {
+            return false;
+        }
+        currentCoverage = pos + height;
+    }
+    return currentCoverage >= tunnelLength;
+}
+
+int main() {
+    int tunnelLength, numLights;
+    cin >> tunnelLength >> numLights;
+
+    vector<int> positions(numLights);
+    for (int i = 0; i < numLights; i++) {
+        cin >> positions[i];
+    }
+
+    int left = 1, right = tunnelLength, answer = tunnelLength;
+    while (left <= right) {
+        int mid = (left + right) / 2;
+        if (canLightUpTunnel(mid, positions, tunnelLength)) {
+            answer = mid;
+            right = mid - 1;
+        } else {
+            left = mid + 1;
+        }
+    }
+
+    cout << answer << endl;
+    return 0;
+}
diff --git a/BOJ_2343 b/BOJ_2343
new file mode 100644
index 0000000..e847220
--- /dev/null
+++ b/BOJ_2343
@@ -0,0 +1,45 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+bool canDivideLectures(const vector<int>& lessons, int numBluRays, int maxSize) {
+    int count = 1, currentSum = 0;
+    for (int lesson : lessons) {
+        if (currentSum + lesson > maxSize) {
+            count++; // 새로운 블루레이에 녹화
+            currentSum = lesson;
+            if (count > numBluRays) return false;
+        } else {
+            currentSum += lesson;
+        }
+    }
+    return true;
+}
+
+int main() {
+    int numLessons, numBluRays;
+    cin >> numLessons >> numBluRays;
+    
+    vector<int> lessons(numLessons);
+    int maxLesson = 0, totalSum = 0;
+    for (int i = 0; i < numLessons; i++) {
+        cin >> lessons[i];
+        maxLesson = max(maxLesson, lessons[i]);
+        totalSum += lessons[i];
+    }
+    
+    int left = maxLesson, right = totalSum, answer = totalSum;
+    while (left <= right) {
+        int mid = (left + right) / 2;
+        if (canDivideLectures(lessons, numBluRays, mid)) {
+            answer = mid; // 가능한 블루레이 크기이므로 저장
+            right = mid - 1; // 더 작은 크기를 탐색
+        } else {
+            left = mid + 1; // 더 큰 크기를 탐색
+        }
+    }
+
+    cout << answer << endl;
+    return 0;
+}
diff --git a/BOJ_3079 b/BOJ_3079
new file mode 100644
index 0000000..9299f50
--- /dev/null
+++ b/BOJ_3079
@@ -0,0 +1,42 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+bool canProcessAll(int64_t time, const vector<int>& times, int64_t numPeople) {
+    int64_t totalProcessed = 0;
+    for (int t : times) {
+        totalProcessed += time / t; // 각 심사대에서 주어진 시간 내에 처리할 수 있는 사람 수
+        if (totalProcessed >= numPeople) return true; // 필요한 사람 수를 모두 처리할 수 있으면 true
+    }
+    return totalProcessed >= numPeople;
+}
+
+int main() {
+    int numStations;
+    int64_t numPeople;
+    cin >> numStations >> numPeople;
+
+    vector<int> times(numStations);
+    int maxTime = 0;
+    for (int i = 0; i < numStations; i++) {
+        cin >> times[i];
+        maxTime = max(maxTime, times[i]);
+    }
+
+    int64_t left = 1, right = static_cast<int64_t>(maxTime) * numPeople;
+    int64_t answer = right;
+
+    while (left <= right) {
+        int64_t mid = (left + right) / 2;
+        if (canProcessAll(mid, times, numPeople)) {
+            answer = mid; // 가능한 시간이면 저장
+            right = mid - 1; // 더 작은 시간으로 탐색
+        } else {
+            left = mid + 1; // 더 큰 시간으로 탐색
+        }
+    }
+
+    cout << answer << endl;
+    return 0;
+}