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백준/17387.Py

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+import sys
+
+input = sys.stdin.readline
+
+x1, y1, x2, y2 = map(int, input().split())
+x3, y3, x4, y4 = map(int, input().split())
+
+ccw_a_1 = (x1 * y3 + x3 *y4+ x4*y1)-(x3*y1+x4*y3+x1*y4)
+ccw_a_2 = (x2*y3+x3*y4+x4*y2) - (x3*y2+x4*y3+x2*y4)
+
+    ccw_a = ccw_a_1 * ccw_a_2
+
+    ccw_b_1 = (x3 * y1 + x1 *y2+ x2*y3)-(x1*y3+x2*y1+x3*y2)
+    ccw_b_2 = (x4 * y1 + x1 *y2+ x2*y4)-(x1*y4+x2*y1+x4*y2)
+
+ccw_b = ccw_b_1 * ccw_b_2
+
+if(ccw_a==0 and ccw_b==0):
+    if min(x1, x2) <= max(x3, x4) and min(x3, x4) <= max(x1, x2) and min(y1, y2)<= max(y3, y4) and min(y3,y4) <= max(y1, y2):
+        print(1)
+    else:
+        print(0)
+elif(ccw_a<=0 and ccw_b<=0):
+    print(1)
+else:
+    print(0)

백준/22864.Py

@@ -0,0 +1,24 @@
+import sys
+
+A, B, C, M = map(int, input().split(' '))
+
+tired = 0
+work = 0
+
+def promising(i):
+    if(tired+A>M):
+        return False
+    else:
+        return True
+
+
+for i in range(24):
+    if(promising(i)):
+        work += B
+        tired += A
+    else:
+        tired-=C
+        if(tired<0):
+            tired=0
+
+print(work)

백준/25212.py

@@ -0,0 +1,24 @@
+import sys
+from itertools import combinations
+
+input = sys.stdin.readline
+
+n = int(input())
+arr = list(map(int, input().split()))
+total = 0
+
+translate_arr = [0] * n
+
+for i in range(n):
+    translate_arr[i] = 1 / arr[i]
+
+for i in range(1, n+1):
+    for j in combinations(translate_arr, i):
+        print(j)
+
+        k = sum(j)
+        if(k>=0.99 and k<=1.01):
+            total+=1
+
+print(total)
+

백준/28467.py

@@ -0,0 +1,34 @@
+#뭔가 Linkedlist 형태면 더 쉽게 문제 풀이도 가능할 것 같은데 아쉽네
+
+import sys
+
+input = sys.stdin.readline
+
+n = int(input())
+arr = list(map(int, input().split()))
+diff = [0 for _ in range(401)]
+total_mana = 0
+check=False
+if(len(arr)<=1):
+    check=True
+
+while(len(arr)>2):
+    diff_num = sys.maxsize
+    for i in range(len(arr)-1):
+        diff[i] = abs(arr[i+1] - arr[i])
+        if(diff[i] < diff_num):
+            diff_num = diff[i]
+            min_index = i
+    total_mana+=arr[min_index]+arr[min_index+1]
+    max_value = max(arr[min_index], arr[min_index+1])
+    arr[min_index+1] = max_value
+    del arr[min_index]
+
+
+if(check):
+    print(0)
+else:
+    print(total_mana+sum(arr))
+    
+
+