Add Job Sequencing in C++ (#5199)

Author: apurvavats

archive/c/c-plus-plus/job-sequencing.cpp

@@ -0,0 +1,92 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <sstream>
+#include <algorithm>
+
+using namespace std;
+
+const string usage_msg = "Usage: please provide a list of profits and a list of deadlines\n";
+const int MAX_JOBS = 100;
+
+struct Job {
+    int profit;
+    int deadline;
+};
+
+bool compare(const Job &a, const Job &b) {
+    return a.profit > b.profit;
+}
+
+int jobSequencing(vector<Job> &jobs) {
+    sort(jobs.begin(), jobs.end(), compare);
+
+    int maxDeadline = 0;
+    for (auto &job : jobs) {
+        maxDeadline = max(maxDeadline, job.deadline);
+    }
+
+    vector<int> slot(MAX_JOBS, 0);
+    int totalProfit = 0;
+
+    for (auto &job : jobs) {
+        for (int j = min((int)jobs.size(), job.deadline) - 1; j >= 0; --j) {
+            if (slot[j] == 0) {
+                slot[j] = 1;
+                totalProfit += job.profit;
+                break;
+            }
+        }
+    }
+
+    return totalProfit;
+}
+
+vector<int> parseInput(const string &input) {
+    vector<int> arr;
+    stringstream ss(input);
+    string token;
+    while (getline(ss, token, ',')) {
+        token.erase(0, token.find_first_not_of(" \t"));
+        token.erase(token.find_last_not_of(" \t") + 1);
+        if (!token.empty()) {
+            try {
+                arr.push_back(stoi(token));
+            } catch (...) {
+                throw invalid_argument("Invalid input");
+            }
+        }
+    }
+    return arr;
+}
+
+int main(int argc, char* argv[]) {
+    if (argc != 3) {
+        cout << usage_msg;
+        return 1;
+    }
+
+    vector<int> profits, deadlines;
+    try {
+        profits = parseInput(argv[1]);
+        deadlines = parseInput(argv[2]);
+    } catch (...) {
+        cout << usage_msg;
+        return 1;
+    }
+
+    if (profits.size() != deadlines.size() || profits.empty()) {
+        cout << usage_msg;
+        return 1;
+    }
+
+    vector<Job> jobs;
+    for (size_t i = 0; i < profits.size(); ++i) {
+        jobs.push_back({profits[i], deadlines[i]});
+    }
+
+    int result = jobSequencing(jobs);
+    cout << result << endl;
+
+    return 0;
+}