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deleted file mode 100644
index 0db7433..0000000
--- a/codeforces/826/io/introductory_problems1754.1.cpout
+++ /dev/null
@@ -1,3 +0,0 @@
-YES
-NO
-YES
diff --git a/codeforces/826/io/introductory_problems1755.1.cpin b/codeforces/826/io/introductory_problems1755.1.cpin
deleted file mode 100644
index 74ef623..0000000
--- a/codeforces/826/io/introductory_problems1755.1.cpin
+++ /dev/null
@@ -1 +0,0 @@
-AAAACACBA
diff --git a/codeforces/826/io/introductory_problems1755.1.cpout b/codeforces/826/io/introductory_problems1755.1.cpout
deleted file mode 100644
index 9eea27d..0000000
--- a/codeforces/826/io/introductory_problems1755.1.cpout
+++ /dev/null
@@ -1 +0,0 @@
-AACABACAA
diff --git a/codeforces/826/io/introductory_problems2165.1.cpin b/codeforces/826/io/introductory_problems2165.1.cpin
deleted file mode 100644
index 0cfbf08..0000000
--- a/codeforces/826/io/introductory_problems2165.1.cpin
+++ /dev/null
@@ -1 +0,0 @@
-2
diff --git a/codeforces/826/io/introductory_problems2165.1.cpout b/codeforces/826/io/introductory_problems2165.1.cpout
deleted file mode 100644
index 80e3859..0000000
--- a/codeforces/826/io/introductory_problems2165.1.cpout
+++ /dev/null
@@ -1,4 +0,0 @@
-3
-1 2
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diff --git a/codeforces/826/io/introductory_problems2205.1.cpin b/codeforces/826/io/introductory_problems2205.1.cpin
deleted file mode 100644
index 0cfbf08..0000000
--- a/codeforces/826/io/introductory_problems2205.1.cpin
+++ /dev/null
@@ -1 +0,0 @@
-2
diff --git a/codeforces/826/io/introductory_problems2205.1.cpout b/codeforces/826/io/introductory_problems2205.1.cpout
deleted file mode 100644
index 743db3e..0000000
--- a/codeforces/826/io/introductory_problems2205.1.cpout
+++ /dev/null
@@ -1,4 +0,0 @@
-00
-01
-11
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diff --git a/codeforces/826/io/introductory_problems2431.1.cpin b/codeforces/826/io/introductory_problems2431.1.cpin
deleted file mode 100644
index 3737d84..0000000
--- a/codeforces/826/io/introductory_problems2431.1.cpin
+++ /dev/null
@@ -1,4 +0,0 @@
-3
-7
-19
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diff --git a/codeforces/826/io/introductory_problems2431.1.cpout b/codeforces/826/io/introductory_problems2431.1.cpout
deleted file mode 100644
index 8313069..0000000
--- a/codeforces/826/io/introductory_problems2431.1.cpout
+++ /dev/null
@@ -1,3 +0,0 @@
-7
-4
-1
diff --git a/codeforces/826/io/introductory_problems3217.1.cpin b/codeforces/826/io/introductory_problems3217.1.cpin
deleted file mode 100644
index 45a4fb7..0000000
--- a/codeforces/826/io/introductory_problems3217.1.cpin
+++ /dev/null
@@ -1 +0,0 @@
-8
diff --git a/codeforces/826/io/introductory_problems3217.1.cpout b/codeforces/826/io/introductory_problems3217.1.cpout
deleted file mode 100644
index 8ca7df3..0000000
--- a/codeforces/826/io/introductory_problems3217.1.cpout
+++ /dev/null
@@ -1,8 +0,0 @@
-0 3 2 3 2 3 4 5 
-3 4 1 2 3 4 3 4 
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-3 2 3 2 3 4 3 4 
-2 3 2 3 4 3 4 5 
-3 4 3 4 3 4 5 4 
-4 3 4 3 4 5 4 5 
-5 4 5 4 5 4 5 6
diff --git a/codeforces/826/io/introductory_problems3311.1.cpin b/codeforces/826/io/introductory_problems3311.1.cpin
deleted file mode 100644
index b994d66..0000000
--- a/codeforces/826/io/introductory_problems3311.1.cpin
+++ /dev/null
@@ -1,4 +0,0 @@
-3 4
-AAAA
-BBBB
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diff --git a/codeforces/826/io/introductory_problems3311.1.cpout b/codeforces/826/io/introductory_problems3311.1.cpout
deleted file mode 100644
index 6f94dab..0000000
--- a/codeforces/826/io/introductory_problems3311.1.cpout
+++ /dev/null
@@ -1,3 +0,0 @@
-CDCD
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diff --git a/codeforces/826/io/introductory_problems3399.1.cpin b/codeforces/826/io/introductory_problems3399.1.cpin
deleted file mode 100644
index afc8ed8..0000000
--- a/codeforces/826/io/introductory_problems3399.1.cpin
+++ /dev/null
@@ -1,6 +0,0 @@
-5
-4 1 2
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diff --git a/codeforces/826/io/introductory_problems3399.1.cpout b/codeforces/826/io/introductory_problems3399.1.cpout
deleted file mode 100644
index 77cb610..0000000
--- a/codeforces/826/io/introductory_problems3399.1.cpout
+++ /dev/null
@@ -1,11 +0,0 @@
-YES
-1 4 3 2
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-NO
-YES
-1 2 3
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diff --git a/codeforces/826/io/introductory_problems3419.1.cpin b/codeforces/826/io/introductory_problems3419.1.cpin
deleted file mode 100644
index 7ed6ff8..0000000
--- a/codeforces/826/io/introductory_problems3419.1.cpin
+++ /dev/null
@@ -1 +0,0 @@
-5
diff --git a/codeforces/826/io/introductory_problems3419.1.cpout b/codeforces/826/io/introductory_problems3419.1.cpout
deleted file mode 100644
index 55bad9f..0000000
--- a/codeforces/826/io/introductory_problems3419.1.cpout
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