Add New Questions

dawid_and_bags_of_candies.py

@@ -0,0 +1,17 @@
+#https://codeforces.com/problemset/problem/1230/A
+
+def brut(s, i):
+    if(s == (sum(lis)-s)):
+        return 1
+    if(i == 4):
+        return 0
+
+    return max(brut(s, i+1), brut(s+lis[i], i+1))
+
+
+lis = list(map(int, input().split()))
+
+if(brut(0, 0) == 1):
+    print("YES")
+else:
+    print("NO")

from_hero_to_zero.py

@@ -0,0 +1,14 @@
+#https://codeforces.com/problemset/problem/1175/A
+
+a = int(input())
+for i in range(a):
+    b, c = map(int, input().split())
+    q = 0
+    while(b != 0):
+        aux = b//c
+        q += b-(aux*c)
+        b = aux
+        if(aux > 0):
+            q += 1
+
+    print(q)

good_string.py

@@ -0,0 +1,25 @@
+#https://codeforces.com/problemset/problem/1140/B
+
+rep = int(input())
+
+for i in range(rep):
+    a = int(input())
+    string = input()
+
+    if(string[0] == "<" and string[-1] == ">"):
+        mc = 0
+        mf = 0
+        for i in range(len(string)):
+            if(string[i] == "<"):
+                mc += 1
+            else:
+                break
+        for i in range(len(string)-1, -1, -1):
+            if(string[i] == ">"):
+                mf += 1
+            else:
+                break
+        print(min(mc, mf))
+
+    else:
+        print(0)

plus_from_picture.py

@@ -0,0 +1,66 @@
+#https://codeforces.com/problemset/problem/1182/B
+
+a, b = map(int, input().split())
+
+resp = True
+
+grid = []
+
+for i in range(a):
+    grid.append(input())
+
+if(a < 3 or b < 3):
+    resp = False
+else:
+    l = [0 for i in range(a)]
+    c = [0 for i in range(b)]
+    for i in range(a):
+        for j in range(b):
+            if(grid[i][j] == "*"):
+                l[i] += 1
+                c[j] += 1
+
+    ml = -1
+    mc = -1
+    flag = 0
+    for i in range(a):
+        if(l[i] == 0):
+            if(flag == 1):
+                flag = 2
+        elif(flag == 2):
+            resp = False
+        elif(l[i] != 1 and ml != -1):
+            resp = False
+        elif(l[i] != 1):
+            ml = i
+            flag = 1
+        else:
+            flag = 1
+
+    flag = 0
+    for i in range(b):
+        if(c[i] == 0):
+            if(flag == 1):
+                flag = 2
+        elif(flag == 2):
+            resp = False
+        elif(c[i] != 1 and mc != -1):
+            resp = False
+        elif(c[i] != 1):
+            mc = i
+            flag = 1
+        else:
+            flag = 1
+
+    if(grid[ml][mc] != "*"):
+        resp = False
+    if(ml == 0 or ml >= a-1 or mc == 0 or mc >= b-1):
+        resp = False
+    elif(grid[ml][mc+1] != "*" or grid[ml][mc-1] != "*" or grid[ml+1][mc] != "*" or grid[ml-1][mc] != "*"):
+        resp = False
+
+
+if(resp):
+    print("YES")
+else:
+    print("NO")