add streamline_csv

tools/streamline_csv.cpp

@@ -0,0 +1,57 @@
+#include <iostream>
+#include <string>
+#include <fstream>
+
+using namespace std;
+ifstream File_input;
+ofstream File_output;
+
+int main() {
+    string str;
+    int i, j, num, times;
+    
+    // farthest
+    File_input.open("farthest_raw.csv");
+    File_output.open("farthest.csv");
+    num = 0;
+    while (!File_input.eof()) {
+        File_input >> str;
+        times = 0;
+        for (i = 0; i < str.size(); i++) {
+            if (str[i] == ',') {times++;}
+            if (times == 3) {break;}
+        }
+        File_output << str.substr(0, i) << "\n";
+        num++;
+        if (num % 100000 == 0) {cout << num << "/29334498" << endl;}
+        File_input.get();
+        if (File_input.peek() == '\n') {break;}
+    }
+    File_input.close();
+    File_output.close();
+
+    // solution
+    File_input.open("solution_raw.csv");
+    File_output.open("solution.csv");
+    num = 0;
+    while (!File_input.eof()) {
+        File_input >> str;
+        times = 0;
+        for (i = 0; i < str.size(); i++) {
+            if (str[i] == ',') {
+                times++;
+                if (times == 3) {j = i;}
+            }
+            if (times == 4) {break;}
+        }
+        File_output << str.substr(0, j) << str.substr(i) << "\n";
+        num++;
+        if (num % 100000 == 0) {cout << num << "/29334498" << endl;}
+        File_input.get();
+        if (File_input.peek() == '\n') {break;}
+    }
+    File_input.close();
+    File_output.close();
+
+    return 0;
+}