0_0_26476636_2436.cpp: In function 'int main()':
0_0_26476636_2436.cpp:82:5: error: 'R' was not declared in this scope
R = ceil(r);
^
0_0_26476636_2436.cpp:102:20: error: cannot convert 'double (*)(int, int)' to 'double' in initialization
double d = dis;
^
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