Increasing Array

n = int(input())
ints = input().split()

edits = 0
last_num = 1

for i in ints:
    diff = last_num - int(i);
    if diff > 0:
        edits += diff;
    else:
        last_num = int(i);

print(edits)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED