practice 15-Jan-2020

Author: sureshmangs

competitive programming/codechef/chefstlt.cpp

@@ -0,0 +1,29 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+    int t;
+    cin>>t;
+    while(t--){
+        string s1,s2;
+        cin>>s1>>s2;
+        int maxi=0, mini=0;
+        int n = s1.length();
+        for(int i=0;i<n;i++){
+            if(s1[i]=='?' || s2[i]=='?') {
+                maxi+=1;
+            }
+            else if(s1[i]!=s2[i]){
+                maxi+=1;
+                mini+=1;
+            }
+        }
+        cout<<mini<<" "<<maxi<<endl;
+    }
+
+
+return 0;
+}

competitive programming/codechef/diffsum.cpp

@@ -0,0 +1,15 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+    int n1,n2;
+    cin>>n1>>n2;
+    if(n1>n2) cout<<n1-n2;
+    else cout<<n1+n2;
+
+
+return 0;
+}

competitive programming/codechef/twtclose.cpp

@@ -0,0 +1,39 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+    int n,k;
+    cin>>n>>k;
+    bool arr[n];
+    memset(arr,false,sizeof(arr));
+    while(k--){
+        string s;
+        getline(cin,s);
+        getline(cin,s);
+        int len=s.length();
+        if(s[7]=='L')
+            cout<<"0"<<endl;
+        else{
+            int res=0;
+            for(int i=6;i<=len;i++){
+                int ch=s[i]-'0';
+                res=(res*10)+ch;
+            }
+            if(arr[--res]) {
+                arr[--res]=false;
+            }
+            else {
+                arr[--res]=true;
+            }
+        }
+        int cnt=0;
+        for(int i=0;i<n;i++)
+            if(arr[i]) cnt++;
+        cout<<cnt<<endl;
+    }
+
+return 0;
+}