cp_library/alg/iter/sum_range_fn.py

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• Last update: 2025-03-30 20:17:47+09:00

Code

import cp_library.alg.iter.__header__
from typing import SupportsIndex
from cp_library.misc.typing import _T

def sum_range(A: list[_T], l: SupportsIndex, r: SupportsIndex, step: SupportsIndex = 1, /, initial: _T = 0) -> _T:
    for i in range(l,r,step): initial += A[i]
    return initial

'''
╺━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╸
             https://kobejean.github.io/cp-library               
'''
from typing import SupportsIndex
from typing import TypeVar
_T = TypeVar('T')

def sum_range(A: list[_T], l: SupportsIndex, r: SupportsIndex, step: SupportsIndex = 1, /, initial: _T = 0) -> _T:
    for i in range(l,r,step): initial += A[i]
    return initial

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