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#!/usr/bin/env python3
def main() -> None:
with open("input", "r", encoding="utf-8") as f:
data = list(map(lambda l: [int(n) for n in l.strip()], f.readlines()))
acc = 0
rows = len(data[0])
cols = len(data)
for i in range(cols):
for j in range(rows):
if (
i != 0
and data[i - 1][j] <= data[i][j]
or i != cols - 1
and data[i + 1][j] <= data[i][j]
or j != 0
and data[i][j - 1] <= data[i][j]
or j != rows - 1
and data[i][j + 1] <= data[i][j]
):
continue
acc += data[i][j] + 1
print(acc)
if __name__ == "__main__":
main()
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