2023 Post World Finals Online ICPC Challenge powered by Huawei


A. Accuracy-Preserving Summation Algorithm
time limit per test: 10 seconds
memory limit per test: 1024 megabytes
input: standard input
output: standard output

Examples
Input
2 -4.815473e+04 -1.862622e+04
Output
{d:1,2}
Input
3 -4.815473e+01 1.862622e+02 2.997603e+02
Output
{d:1,2,3}
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