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namespace N0 {
namespace N1 {
char *buf0 = nullptr;
char buf1[] = {0, 1, 2, 3, 4, 5, 6, 7};
char sum(char *buf, int size) {
char result = 0;
for (int i = 0; i < size; i++)
result += buf[i];
return result;
}
} // namespace N1
} // namespace N0
int main() {
char result = N0::N1::sum(N0::N1::buf1, sizeof(N0::N1::buf1));
return 0;
}
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