add introduction problems

Author: sandromirr

Introduction/01-introduction.pdf

@@ -0,0 +1,7 @@
+#include <iostream>
+using namespace std;
+int main(){
+    int a,b;
+    cin >> a >> b;
+    cout << (a + b) << endl;
+}

Introduction/1000.cpp

@@ -0,0 +1,22 @@
+import java.util.*;
+import java.math.BigDecimal;
+
+class Solution{
+    public static void main(String []args){
+        Scanner sc = new Scanner(System.in);
+        
+        while(sc.hasNext()){
+            BigDecimal a = sc.nextBigDecimal();
+            int n = sc.nextInt();
+            a.pow(n);
+            String str = a.toPlainString();
+            
+            if (str.startsWith("0."))
+			{
+				str = str.substring(1);
+            }
+
+            System.out.println(str);
+        }
+    }
+}

Introduction/1001.java

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+int main(){
+    float m;
+    while(cin >> m){
+        if(m == 0.00){
+            break;
+        }
+
+        float s = 0;
+        int i = 0;
+        while(s < m){
+            ++i;
+            s += 1.0 / (i + 1);
+        }
+
+        cout << i << " card(s)" << endl;
+    }
+}

Introduction/1003.cpp

@@ -0,0 +1,15 @@
+#include <iostream>
+#include <iomanip>
+using namespace std;
+
+int main(){
+    double amount,sum = 0.0,average;
+
+    for(int i = 0 ; i < 12; i++){
+        cin >> amount;
+        sum += amount;
+    }
+
+    average = sum / 12;
+    cout << "$" << average; 
+}

Introduction/1004.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <string>
+#include <map>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+int sortedCalculation(string s){
+    int ans = 0;
+    int n = s.size();
+    for(int i = 0 ; i < n ; i++){
+        for(int j = i + 1 ; j < n ; j++){
+            if(s[i] > s[j]){
+                ans++;
+            }
+        }
+    }
+    return ans;
+}
+
+int main(){
+    int n,m;
+    string s;
+    map<int,vector<string>> map;
+    cin >> n >> m;
+    
+    for(int i = 0 ; i < m ; i++){
+        cin >> s;
+        map[sortedCalculation(s)].push_back(s);
+    }
+
+    for(std::map<int,vector<string>>::iterator it=map.begin(); it!=map.end(); ++it){
+        sort(it->second.begin(),it->second.end());
+        for(int i = 0 ; i < it->second.size() ; i++){
+            cout << it->second[i] << endl;
+        }
+    }
+}

Introduction/1007.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <string>
+#include <math.h>
+#include <cstring>
+using namespace std;
+
+int main(){
+    string s;
+    int count[26] = {0};
+    int c = 4;
+
+    while(c--) {
+      getline(cin,s);
+       for(int i = 0 ; i < s.size() ; i++){
+           if(s[i] >= 'A' && s[i] <= 'Z'){
+               count[s[i] - 'A']++;
+           }
+       }
+    }
+
+    int length = 0;
+
+    for(int i = 0 ; i < 26 ; i++){
+        length = max(length,count[i]);
+    }
+
+
+    for(int i = length ; i > 0; i--){
+        for(int j = 0 ; j < 26 ; j++){
+            if(count[j] >= i){
+                cout << "* ";
+            }else{
+                cout << "  ";
+            }
+        }
+        cout << endl;
+    }
+
+    for(int i = 0 ; i < 26 ; i++){
+        cout << char('A' + i) << ' ';
+    }
+}

Introduction/2136.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+using namespace std;
+
+int main(){
+    int n,ways = 0;
+    cin >> n;
+
+    for(int i = 1 ; i <= n; i++){
+        int sum = 0;
+        for(int j = i ; j <= n ; j++){
+            sum += j;
+            if(sum > n) break;
+            if(sum == n){
+                ways++;
+                break;
+            }
+        }
+    }
+
+    cout << ways << endl;
+}