Set up base directory for usaco and started on gift1

usaco/base.cpp

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+/*
+ID: philipp17
+PROG: 
+LANG: C++                 
+*/
+/* LANG can be C++11 or C++14 for those more recent releases */
+#include <iostream>
+#include <fstream>
+#include <string>
+
+using namespace std;
+
+int main() {
+    ofstream fout (".out");
+    ifstream fin (".in");
+
+    string a, b;
+    
+    fin >> a >> b;
+
+    return 0;
+}

usaco/ch1/gift1.cpp

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+/*
+ID: philipp17
+PROG: gift1
+LANG: C++                 
+*/
+/* LANG can be C++11 or C++14 for those more recent releases */
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <map>
+#include <vector>
+
+using namespace std;
+
+
+int main() {
+    ofstream fout ("gift1.out");
+    ifstream fin ("gift1.in");
+
+    int np;
+    fin >> np;
+
+    map<string, int> names_to_index;
+    map<int, string> index_to_name;
+
+    vector<int> bank(np, 0);
+    vector<int> spendings(np, 0);
+
+    for(int i = 0; i < np; ++i){
+        string s;
+        fin >> s;
+
+        names_to_index[s] = i;
+        index_to_name[i] = s;
+    }
+
+    for(int i = 0; i < np; ++i){
+        string name;
+        int money, ng;
+
+        fin >> name >> money >> ng;
+
+        if(ng == 0){
+            continue;
+        }
+
+        vector<string> receivers(ng);
+        for(int j = 0; j < ng; ++i){
+            fin >> receivers[j];
+        }
+
+        if(money == 0){
+            continue;
+        }
+
+        int money_per_person = money / ng;
+
+        for(const string &receiver : receivers){
+            bank[names_to_index[receiver]] += money_per_person;
+            spendings[names_to_index[receiver]] -= money_per_person;
+        }
+    }
+
+    // Printing the output
+    for(int i = 0; i < np; ++i){
+        fout << index_to_name[i] << bank[i] - spendings[i] << endl;
+    }
+
+    return 0;
+}