Submission #3784168

Source Code Expand

# -*- coding: utf-8 -*-


def main():
    a = int(input())
    b = int(input())
    mod = 10 ** 9 + 7
    ans = 0

    # See:
    # https://beta.atcoder.jp/contests/indeednow-finalb-open/submissions/2066213
    for i in range(a, b + 1):
        ans += ((i ** 2 * (i + 1)) // 2) % mod

    print(ans % mod)


if __name__ == '__main__':
    main()

Submission Info

Submission Time
Task A - Counting on a Triangle
User hiro_hiro
Language Python (3.4.3)
Score 100
Code Size 365 Byte
Status AC
Exec Time 497 ms
Memory 2940 KB

Judge Result

Set Name Sample Subtask1 All
Score / Max Score 0 / 0 20 / 20 80 / 80
Status
AC × 3
AC × 13
AC × 26
Set Name Test Cases
Sample subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt
Subtask1 subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask0_sample_01.txt, subtask0_sample_02.txt
All subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask2_01.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt, subtask2_11.txt, subtask2_12.txt
Case Name Status Exec Time Memory
subtask0_sample_01.txt AC 17 ms 2940 KB
subtask0_sample_02.txt AC 17 ms 2940 KB
subtask0_sample_03.txt AC 17 ms 2940 KB
subtask1_01.txt AC 17 ms 2940 KB
subtask1_02.txt AC 17 ms 2940 KB
subtask1_03.txt AC 17 ms 2940 KB
subtask1_04.txt AC 17 ms 2940 KB
subtask1_05.txt AC 17 ms 2940 KB
subtask1_06.txt AC 17 ms 2940 KB
subtask1_07.txt AC 17 ms 2940 KB
subtask1_08.txt AC 17 ms 2940 KB
subtask1_09.txt AC 17 ms 2940 KB
subtask1_10.txt AC 17 ms 2940 KB
subtask1_11.txt AC 17 ms 2940 KB
subtask2_01.txt AC 497 ms 2940 KB
subtask2_02.txt AC 496 ms 2940 KB
subtask2_03.txt AC 47 ms 2940 KB
subtask2_04.txt AC 53 ms 2940 KB
subtask2_05.txt AC 40 ms 2940 KB
subtask2_06.txt AC 114 ms 2940 KB
subtask2_07.txt AC 144 ms 2940 KB
subtask2_08.txt AC 101 ms 2940 KB
subtask2_09.txt AC 468 ms 2940 KB
subtask2_10.txt AC 442 ms 2940 KB
subtask2_11.txt AC 456 ms 2940 KB
subtask2_12.txt AC 435 ms 2940 KB